Thiadiazines, and insecticidal and acaricidal preparations
This application is a continuation-in-part application of Ser. No. 248,230 filed on Sept. 23, 1988, now abandoned. 
     This invention relates to tetrahydro-1,3,5-thiadiazin-4-ones represented by the following general ##STR4## wherein each of R 1  and R 2  represents a halogen  atom or a C 1  -C 4  alkyl group; R 3  represents a halogen atom, a C 1  -C 4  alkyl group, a C 3  -C 6  cycloalkyl group, a C 1  -C 4  alkoxy group, an acetyl group, a phenoxy group, a halo-substituted phenoxy group, a benzyl group, a benzyloxy group, a phenylcarbonyl group, a C 1  -C 4  haloalkyloxy group, a C 1  -C 4  haloalkyloxymethyl roup, a C 2  -C 4  haloalkenyloxy group, a C 1  -C 4  haloalkylthio group, a C 1  -C 4  haloalkylthiomethyl group, a C 2  -C 4  haloalkenylthio group, a C 1  -C 8  haloalkyl group, a C 2  -C 8  haloalkenyl group, a Cl-C8 alkyloxycarbonyl group, a substituted phenoxycarbonyl group, or a substituted pyridyloxy group; m represents 0, 1, 2 or 3; and n represents 0, 1, 2 or 3, or salts thereof; a process for production thereof; and to an insecticidal and acaricidal agent comprising at least one of the above compounds as an active ingredient. 
     The compounds of this invention are useful in various industrial fields, and particularly in the agricultural field as an insecticidal and acaricidal agent. 
     Japanese Laid-Open Patent Publications Nos. 1979, 12890/1979 and 154780/1979 state that tetrahydro-1,3,5-thiadiazin-4-ones have insecticidal and acaricidal activities. 
     Among them, 2-tertiary butylimino-3-isopropyl5-phenyl-tetrahydro-1,3,5-thiadiazin-4-one (common name: Buprofezin) represented by the following formula ##STR5## has been put to pracical use as an insecticide. 
     Japanese Laid-Open Patent Publication No. 140577/1986 discloses that tetrahydro-1,3,5-thiadiazin-4-ones in which the 2-imino group or at least one of the 3- and 5-positions is substituted by a certain substituted phenylalkyl group are novel compounds having insecticidal and acaricidal activities, and particularly, tetrahydro-1,3,5-thiadiazin-4-ones in which at least one of the 2-imino group and the 3-position is substituted by a substituted phenylalkyl group have marked insecticidal and acaricidal activities over the known compound Buprofezin. These insecticidal and acaricidal compounds, however, have no sufficient insecticidal activity on lepidopterous pests although they do have insecticidal activity on hemipterous and coleopterous pests. It has been desired therefore to develop a novel agent having similar activity to these insecticidal and acaricidal compounds and outstanding insecticidal and acaricidal activities on lepidopterous pests as well. 
     It is an object of this invention to provide an excellent insecticidal and acaricidal compound having a new structure, a broad insecticidal specrum and high insecticidal and acaricidal activities and being free from the problems of the prior art, an insecticidal and acaricidal agent, and a simple process for producing the insecticidal compound. 
     The present inventors made extensive investigations on tetrahydro-1,3,5-thiadiazin-4-ones in order to achieve the above object, and have now found that 2-(2,2,2-trifluoroethylimino)-tetrahydro-1,3,5-thiadiazin-4-ones or salts thereof have a broad insecticidal spectrum and exhibit high insecticidal and acaricidal activities also on lepidopterous pests on which known analogous compounds do not show sufficient insecticidal activity. 
     According to this invention, there is provided a tetrahydro-1,3,5-thiadiazin-4-one represented by the following general formula (I) ##STR6## wherein each of R 1  and R 2  represents a halogen atom or an alkyl group having 1 to 4 carbon atoms; R 3  represents a halogen atom, an alkyl group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an acetyl group, a phenoxy group, a halo-substituted phenoxy group, a benzyl group, a benzyloxy group, a phenylcarbonyl group, a haloalkyloxy group having 1 to 4 carbon atoms, a haloalkyloxymethyl group having 1 to 4 carbon atoms, a haloalkenyloxy group having 2 to 4 carbon atoms, a haloalkylthio group having 1 to 4 carbon atoms, a haloalkylthiomethyl group having 1 to 4 carbon atoms, a haloalkenylthio group having 2 to 4 carbon atoms, a haloalkyl group having 1 to 8 carbon atoms, a haloalkenyl group having 2 to 8 carbon atoms, a alkyloxycarbonyl group having 1 to 8 carbon atoms, a substituted phenoxycarbonyl group, or a substituted pyridyloxy group; m represents 0, 1, 2 or 3; and n represents 0, 1, 2 or 3, or their salts. 
     The invention also provides a process for producing the tetrahydro-1,3,5-thiadiazin-4-ones of general formula (I) or their salts, which comprises reacting a compound represented by the following general formula (II) ##STR7## wherein R 1  and m are as defined above, with a compound represented by the following formula (III) ##STR8## wherein R 2 , R 3  and n are as defined above. 
     The present invention further provides an insecticidal and acaricidal agent comprising at lest one tetrahydro-1,3,5-thiadiazin-4-one of general formula (I) or a salt thereof as active ingredient. 
     The tetrahydro-1,3,5-thiadiazin-4-ones of general formula (I) and their salts are not described in the literature, and are novel compounds. 
     When in the compound of this invention represented by general formula (I), the benzyl group at the 3-position of the thiadiazine ring has one substituent, it is preferably substituted at the 3- or 4-position, especially at the 4-position, of the benzyl group. When the benzyl group at the 3-position has two substituents, they are preferably substituted at the 3,4-positions of the benzyl 9roup. The 3-position substituent is preferably a halo9en atom, especially a fluorine or chlorine atom. 
     When the 4-position substituent is a halo9en atom, the halogen atom is preferably an iodine, chlorine, bromine or fluorine atom, especially the chlorine atom. 
     When the 4-position substituent is an alkyl group, the alkyl group is preferably a methyl, ethyl, isopropyl, n-butyl, sec-butyl or t-butyl group, especially the t-butyl group. 
     When the 4-position substituent is a cycloalkyl group, the cycloalkyl group is preferably a cyclopropyl, cyclopropylmethyl, cyclopentyl, or cyclohexyl group, especially the cyclohexyl group. 
     When the 4-position substituent is an alkoxy group, the alkoxy group is preferably a methoxy, ethoxy, isopropoxy, n-butoxy, sec-butoxy or t-butoxy group, especially the isopropoxy group. 
     When the 4-position substituent is a substituted phenoxy group, the substituted phenoxy group is preferably a 2-chlorophenoxy, 3-chlorophenoy, 4-chlorophenoxy, 2-fluorophenoxy, 3-fluorophenoxy, 4-fluorophenoxy, 2,4-dichlorophenoxy, 3,4-dichlorophenoxy, 3,5-dichlorophenoxy, 2,4-difluorophenoxy, 2,6-difluorophenoxy, 2-chloro-4-trifluoromethylphenoxy, 4-trifluoromethylphenoxy, 4-pentafluoroethylphenoxy, 4-trifluoromethoxyphenoxy, 4-methoxyphenoxy, 2-methylphenoxy, 3-methylphenoxy, 4-methylphenoxy, 2,4-dimethylphenoxy or 4-t-butylphenoxy group, especially the 2,4-dichlorophenoxy group. 
     When the 4-position substituent is a haloalkyloxy group, the halogen atom is preferably a bromine, chlorine or fluorine atom, especially the fluorine atom. Examples of preferred haloalkyloxy groups are difluoromethoxy, bromodifluoromethoxy, 2,2,2-trifluoroethoxy, 1,1,2,2-tetrafluoroethoxy, 2,2,3,3-tetrafluoropropyloxy and 2,2,3,3,4,4,4-hexafluorobutoxy groups. The trifluoromethoxy group is especially preferred. 
     When the 4-position substituent is a haloalkyloxymethyl group, the halogen atom is preferably a bromine, chlorine or fluorine atom, especially the fluorine atom. Preferred haloalkyloxymethyl groups include, for example, difluoromethoxymethyl, trifluoromethoxymethyl, chlorodifluoromethoxymethyl, bromodifluoromethoxymethyl, 2,2,2-trifluoroethoxymethyl, 1,1,2,2-tetrafluoroethoxymethyl and 2,2,2-trifluoro-1-methylethoxymethyl groups. The 2,2,2-trifluoroethoxymethyl group is preferred. 
     When the 4-position substituent is a haloalkenyloxy group, the halogen atom is preferably a bromine, chlorine or fluorine atom, especially the fluorine or chlorine atom. Examples of preferred haloalkenyloxy groups include 1,2,2-trichlorovinyloxy, 2,2-dichloro-1-fluorovinyloxy, 2-chloro-2-propeneoxy, 2-bromo-2-propeneoxy, 2,3-dichloro-2-propeneoxy, 3-chloro-2-n-buteneoxy and 3-chloro-3-buteneoxy groups. The 1,2,2-trichlorovinyloxy groups and 2-chloro-2-propeneoxy groups are especially preferred. 
     When the 4-position substituent is a haloalkylthio group, the halogen atom is preferably a bromine, chlorine or fluorine atom, especially preferably the fluorine atom. Examples of preferred haloalkylthio groups include difluoromethylthio, trifluoromethylthio, chlorodifluoromethylthio, bromodifluoromethylthio, 2,2,2-trifluoroethylthio, 1,1,2,2-tetrafluoroethylthio, 2,2,3,3-tetrafluoropropylthio and 2,2,3,3,4,4,4-hexafluorobutylthio groups. The trifluoromethylthio group is especially preferred. 
     When the 4-position substituent is a haloalkylthiomethyl group, the halogen atom is preferably a bromine, chlorine or fluorine atom. The fluorine atom is especially preferred. Examples of preferred haloalkylthiomethyl groups include difluoromethylthiomethyl, trifluoromethylthiomethyl, chlorodifluoromethylthiomethyl, bromodifluoromethylthiomethyl, 2,2,2-trifluoroethylthiomethyl, 1,1,2,2-tetrafluoroethylthiomethyl and 2,2,2-trifluoro-1-methylethylthiomethyl groups. The 2,2,2-trifluoroethylthiomethyl group is especially preferred. 
     When the 4-position substituent is a haloalkenylthio group, the halogen atom is preferably a bromine, chlorine or fluorine atom, especially a fluorine or chlorine atom. Examples of preferred haloalkenylthio groups include 1,2,2-trichlorovinylthio, 2,2-dichloro-1-fluorovinylthio, 2-chloro-2-propenethio, 2-bromo-2-propenethio, 2,3-dichloro-2-propenethio, 3-chloro-2-n-butenethio and 3-chloro-3-butenethio groups. The 1,2,2-trichlorovinylthio and 2-chloro-2-propenethio groups are preferred. 
     When the 4-position substituent is a haloalkyl group, the halogen atom is preferably a bromine, chlorine or fluorine atom, especially the fluorine atom. Preferred haloalkyl groups include, for example, chlorodifluoromethyl, chlorodibromomethyl, trichloromethyl, trifluoromethyl, pentafluoroethyl, n-heptafluoropropyl, n-tridecafluorohexyl, 2,2,2-trifluoroethyl and 2,2-bis-trifluoromethyl)-3,3,4,4,5,5,5-heptafluoropentyl groups. The pentafluoroethyl group is especially preferred. 
     When the 4-position substituent is an alkyloxycarbonyl group, its preferred examples include methoxycarbonyl, ethoxycarbonyl, n-propoxycarbonyl, isopropoxycarbonyl, n-butoxycarbonyl, isobutoxycarbonyl, secbutoxycarbonyl, t-butoxycarbonyl, n-pentyloxycarbonyl, isopentyloxycarbonyl, n-hexyloxycarbonyl, 2-methylpentyloxycarbonyl, 3-methylpentyloxycarbonyl, n-heptyloxycarbonyl, t-heptyloxycarbonyl and n-octyloxycarbonyl groups. The t-butoxycarbonyl group is especially preferred. 
     When the 4-position substituent is a substituted phenoxycarbonyl group, examples of preferred substituted phenoxycarbonyl groups include phenoxycarbonyl, 2-chlorophenoxycarbonyl, 3-chlorophenoxycarbonyl, 4-chlorophenoxycarbonyl, 2-fluorophenoxycarbonyl, 3-fluorophenoxycarbonyl, 4-fluorophenoxycarbonyl, 2,4-dichlorophenoxycarbonyl, 3,4-dichlorophenoxycarbonyl, 3,5-dichlorophenoxycarbonyl, 2,4-difluorophenoxycarbonyl, 2,6-difluorophenoxycarbonyl, 4-trifluoromethylphenoxycarbonyl, 4-trifluoromethoxyphenoxycarbonyl, 4-methoxyphenoxycarbonyl, 2-methylphenoxycarbonyl, 3-methylphenoxycarbonyl, 4-methylphenoxycarbonyl, 2,4-dimethylphenoxycarbonyl and 4-t-butylphenoxycarbonyl groups. The 2,4-dichlorophenoxycarbonyl group is preferred. 
     When the 4-position substituent is a substituted pyridyloxy group, preferred examples of the substituted pyridyloxy group are 3-chloro-2-pyridyloxy, 3,5-dichloro-2-pyridyloxy, 5-trifluoromethyl-2-pyridyloxy and 3-chloro-5-trifluoromethyl-2-pyridyloxy groups. The 3-chloro-5-trifluoromethyl-pyridyloxy group is especially preferred. 
     When the phenyl group at the 5-position of the thiadiazine ring has one substituent, it may be a halogen atom, preferably a bromine, chlorine or fluorine atom, especially preferably the fluorine atom. The fluorine atom is preferably substituted at the 2-position. The substituent may also be an alkyl group which is preferably a methyl, ethyl, isopropyl or t-butyl group, the methyl group being especially preferred. The mthyl group is substituted preferably at the 3-position or the 4-position. 
     When the phenyl group at the 5-position has two substituents, they may be halogen atoms which are preferably bromine, chlorine and fluorine atoms; or alkyl groups which are preferably methyl, ethyl, isopropyl and t-butyl groups, the methyl group being especially preferred. The two substituents on the phenyl group are preferably at the 2,4-positions, 3,4-positions, or 2,6-positions. Preferably, the 2-position substituent is a fluorine atom; the 3-position substituent is a methyl group; the 4-position substituent is a methyl group; and the 6-position substituent is a fluorine atom. 
     When the phenyl group at the 5-position has three substituents, they may be halogen atoms which are preferably bromine, chlorine and fluorine atoms, the fluorine atom being especially preferred, and alkyl groups which are preferably methyl, ethyl, isopropyl and t-butyl groups, the methyl group being especially preferably. The three substituents on the phenyl group are preferably at the 2,4,6-postions or 3,4,6-positions. Preferably, the 2-position substituent is a fluorine atom; the 3-position substituent is a methyl group; the 4-position substituent is a methyl group; and the 6-position substituent is a fluorine atom. 
     Table 1 below shows typical examples of the compounds of the invention represented by general formula (I) without any intention of limiting the invention thereto. 
     
                       TABLE 1                                                     
______________________________________                                    
Com-                                                                      
pound                                                                     
No.   (R.sup.1).sub.m                                                     
                  (R.sup.2).sub.n                                         
                            R.sup.3                                       
______________________________________                                    
1     H           H         4-CH.sub.3                                    
2     H           H         4-C.sub.2 H.sub.5                             
3     H           H         4-CH(CH.sub.3).sub.2                          
4     H           H         4-CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.3         
5     H           H         4-CH(CH.sub.3)CH.sub.2 CH.sub.3               
6     H           H         4-C(CH.sub.3).sub.3                           
7     4-CH.sub.3  H         4-CH.sub.3                                    
8     4-CH.sub.3  H         4-C.sub.2 H.sub.5                             
9     4-CH.sub.3  H         4-CH(CH.sub.3).sub.2                          
10    4-CH.sub.3  H         4-CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.3         
11    4-CH.sub.3  H         4-CH(CH.sub.3)CH.sub.2 CH.sub.3               
12    4-CH.sub.3  H         4-C(CH.sub.3).sub.3                           
13    2-F         H         4-CH.sub.3                                    
14    2-F         H         4-C.sub.2 H.sub.5                             
15    2-F         H         4-CH(CH.sub.3).sub.2                          
16    2-F         H         4-CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.3         
17    2-F         H         4-CH(CH.sub.3)CH.sub.2 CH.sub.3               
18    2-F         H         4-C(CH.sub.3).sub.3                           
19    2-F, 4-CH.sub.3                                                     
                  H         4-CH.sub.3                                    
20    2-F, 4-CH.sub.3                                                     
                  H         4-CH(CH.sub.3).sub.2                          
21    2-F, 4-CH.sub.3                                                     
                  H         4-C(CH.sub.3).sub.3                           
22    2-F, 6-F    H         4-CH(CH.sub.3).sub.2                          
23    2-F, 6-F    H         4-C(CH.sub.3).sub.3                           
24    2-F, 4-CH.sub.3, 6-F                                                
                  H         4-CH(CH.sub.3).sub.2                          
25    2-F, 4-CH.sub.3, 6-F                                                
                  H         4-C(CH.sub.3).sub.3                           
26    4-CH.sub.3  H         4-OC.sub.2 H.sub.5                            
27    4-CH.sub.3  H         4-OCH(CH.sub.3).sub.2                         
28    4-CH.sub.3  H         4-OCH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2        
                            CH.sub.3                                      
29    H           H         4-Cl                                          
30    H           H         4-Br                                          
31    4-CH.sub.3  H         4-Cl                                          
32    4-CH.sub.3  H         4-Br                                          
33    2-F         H         4-Cl                                          
34    2-F, 4-CH.sub.3                                                     
                  H         4-Cl                                          
35    H           3-Cl      4-Cl                                          
36    4-CH.sub.3  3-Cl      4-Cl                                          
37    H           H         4-CF.sub.3                                    
38    2-F         H         4-CF.sub.3                                    
39    3-CH.sub.3  H         4-CF.sub.3                                    
40    4-CH.sub.3  H         4-CF.sub.3                                    
41    2-F, 4-CH.sub.3                                                     
                  H         4-CF.sub.3                                    
42    2-F, 6-F    H         4-CF.sub.3                                    
43    H           H                                                       
                             ##STR9##                                     
44    H           H                                                       
                             ##STR10##                                    
45    4-CH.sub.3  H                                                       
                             ##STR11##                                    
46    2-F         H                                                       
                             ##STR12##                                    
47    H           H                                                       
                             ##STR13##                                    
48    4-CH.sub.3  H                                                       
                             ##STR14##                                    
49    2-F         H                                                       
                             ##STR15##                                    
50    H           H                                                       
                             ##STR16##                                    
51    4-CH.sub.3  H                                                       
                             ##STR17##                                    
52    H           H                                                       
                             ##STR18##                                    
53    4-CH.sub.3  H                                                       
                             ##STR19##                                    
54    2-F         H                                                       
                             ##STR20##                                    
55    H           3-F       4-CF.sub.3                                    
56    4-CH.sub.3  3-F       4-CF.sub.3                                    
57    2-F         3-F       4-CF.sub.3                                    
58    H           3-F       4-C(CH.sub.3).sub.3                           
59    4-CH.sub.3  3-F       4-C(CH.sub.3).sub.3                           
60    2-F         3-F       4-C(CH.sub.3).sub.3                           
61    H           3-F                                                     
                             ##STR21##                                    
62    4-CH.sub.3  3-F                                                     
                             ##STR22##                                    
63    2-F         3-F                                                     
                             ##STR23##                                    
64    H           H                                                       
                             ##STR24##                                    
65    4-CH.sub.3  H                                                       
                             ##STR25##                                    
66    H           H                                                       
                             ##STR26##                                    
67    4-CH.sub.3  H                                                       
                             ##STR27##                                    
68    H           3-CH.sub.3                                              
                            4-CH.sub.3                                    
69    H           3-Cl, 5-Cl                                              
                            4-CH.sub.3                                    
70    H           H         4-OCHF.sub.2                                  
71    H           H         4-OCF.sub.3                                   
72    H           H         4-OCClF.sub.2                                 
73    H           H         4-OCBrF.sub.2                                 
74    H           H         4-OCH.sub.2 CH.sub.2 F                        
75    H           H         4-OCH.sub.2 CF.sub.3                          
76    H           H         4-OCF.sub.2 CHF.sub.2                         
77    H           H         4-OCH.sub.2 CF.sub.2 CHF.sub.2                
78    H           H         4-OCH.sub.2 CF.sub.2 CF.sub.3                 
79    H           H         4-OCF.sub.2 CHFCF.sub.3                       
80    H           H         4-CH.sub.2 OCBrF.sub.2                        
81    H           H         4-CH.sub.2 OCH.sub.2 CF.sub.3                 
82    H           H         4-OCClCCl.sub.2                               
83    H           H         4-OCFCHCl                                     
84    H           H         4-OCH.sub.2 CFCH.sub.2                        
85    H           H         4-OCH.sub.2 CClCH.sub.2                       
86    H           H         4-OCH.sub.2 CBrCH.sub.2                       
87    H           H         OCH.sub.2 CClCHCl(Z)                          
88    H           H         OCH.sub.2 CClCHCl(E)                          
89    H           H         4-SCH.sub.2 F                                 
90    H           H         4-SCHF.sub.2                                  
91    H           H         4-SCF.sub.3                                   
92    H           H         4-SCBrF.sub.2                                 
93    H           H         4-SCClF.sub.2                                 
94    H           H         SC(CF.sub.3).sub.2 CF.sub.2 CF.sub.2 CF.sub.3 
                            3                                             
95    H           H         4-CH.sub.2 SCH.sub.2 CF.sub.3                 
96    H           H         4-SCH.sub.2 CClCH.sub.2                       
97    H           H         4-CH.sub.2 CF.sub.3                           
98    H           H         4-CF.sub.2 CF.sub.3                           
99    H           H         4-CF.sub.2 CF.sub.2 CF.sub.3                  
100   H           H         4-CF(CF.sub.3).sub.2                          
101   H           H         4-CF.sub.2 (CF.sub.2).sub.4 CF.sub.3          
102   H           H         4-CH.sub.2 C(CF.sub.3).sub.2 CF.sub.2         
                            CF.sub.2 CF.sub.3                             
103   H           H         4-CHCF.sub.2                                  
104   H           H         4-CHCCl.sub.2                                 
105   H           H         4-CHCBr.sub.2                                 
106   H           H         4-CHCClF                                      
107   H           H         4-CHCBrF                                      
108   H           H         4-CHCBrCl                                     
109   H           H         4-CFCF.sub.2                                  
110   H           H         4-CClCCl.sub.2                                
111   H           H         4-CBrCBr.sub.2                                
112   H           H         4-CHCClCF.sub.3                               
113   H           H         4-CCH.sub.3CF.sub.2                           
114   H           H         4-CCH.sub.3CCl.sub.2                          
115   H           H         4-CCH.sub.3CBr.sub.2                          
116   H           H         4-CH.sub.2 CFCH.sub.2                         
117   H           H         4-CH.sub.2 CClCH.sub.2                        
118   H           H         4-CH.sub.2 CBrCH.sub.2                        
119   H           H         4-COOCH(CH.sub.3).sub.2                       
120   H           H         4-COOC(CH.sub.3).sub.3                        
121   H           H         4-COOCH.sub.2 (CH.sub.2).sub.3 CH.sub.3       
122   H           H         4-COOCH.sub.2 (CH.sub.2).sub.6 CH.sub.3       
123   H           H         4-COOQ.sup.1                                  
124   H           H         4-COOQ.sup.2                                  
125   H           H         4-QQ.sup.3                                    
126   3-CH.sub.3  H         4-OCHF.sub.2                                  
127   3-CH.sub.3  H         4-OCF.sub.3                                   
128   3-CH.sub.3  H         4-OCBrF.sub.2                                 
129   3-CH.sub.3  H         4-OCH.sub.2 CF.sub.3                          
130   3-CH.sub.3  H         4-OCF.sub.2 CHF.sub.2                         
131   3-CH.sub.3  H         4-OCH.sub.2 CF.sub.2 CHF.sub.2                
132   3-CH.sub.3  H         4-OCH.sub.2 CF.sub.2 CF.sub.3                 
133   3-CH.sub.3  H         4-OCF.sub.2 CHFCF.sub.3                       
134   3-CH.sub.3  H         4-CH.sub.2 OCH.sub.2 CF.sub.3                 
135   3-CH.sub.3  H         4-OCClCCl.sub.2                               
136   3-CH.sub.3  H         4-OCFCHCl                                     
137   3-CH.sub.3  H         4-OCH.sub.2 CFCH.sub.2                        
138   3-CH.sub.3  H         4-OCH.sub.2 CClCH.sub.2                       
139   3-CH.sub.3  H         4-OCH.sub.2 CBrCH.sub.2                       
140   3-CH.sub.3  H         4-SCHF.sub.2                                  
141   3-CH.sub.3  H         4-SCF.sub.3                                   
142   3-CH.sub.3  H         4-SCBrF.sub.2                                 
143   3-CH.sub.3  H         4-SCClF.sub.2                                 
144   3-CH.sub.3  H         3-CH.sub.2 SCH.sub.2 CF.sub.3                 
145   3-CH.sub.3  H         4-CH.sub.2 CF.sub.3                           
146   3-CH.sub.3  H         4-CF.sub.2 CF.sub.3                           
147   3-CH.sub.3  H         4-CF.sub.2 CF.sub.2 CF.sub.3                  
148   3-CH.sub.3  H         4-CF(CF.sub.3).sub.2                          
149   3-CH.sub.3  H         4-CHCF.sub.2                                  
150   3-CH.sub.3  H         4-CHCCl.sub.2                                 
151   3-CH.sub.3  H         4-CHCBr.sub.2                                 
152   3-CH.sub.3  H         4-CHCClF                                      
153   3-CH.sub.3  H         4-CHCBrF                                      
154   3-CH.sub.3  H         4-CHCBrCl                                     
155   3-CH.sub.3  H         4-CFCF.sub.2                                  
156   3-CH.sub.3  H         4-CClCCl.sub.2                                
157   3-CH.sub.3  H         4-CHCClCF.sub.3                               
158   3-CH.sub.3  H         4-CCH.sub.3CF.sub.2                           
159   3-CH.sub.3  H         4-CCH.sub.3CCl.sub.2                          
160   3-CH.sub.3  H         4-CCH.sub.3CBr.sub.2                          
161   3-CH.sub.3  H         4-CH.sub.2 CFCH.sub.2                         
162   3-CH.sub.3  H         4-CH.sub.2 CClCH.sub.2                        
163   3-CH.sub.3  H         4-CH.sub.2 CBrCH.sub.2                        
164   3-CH.sub.3  H         4-COOC(CH.sub.3).sub.3                        
165   4-CH.sub.3  H         4-OCHF.sub.2                                  
166   4-CH.sub.3  H         4-OCF.sub.3                                   
167   4-CH.sub.3  H         4-OCClF.sub.2                                 
168   4-CH.sub.3  H         4-OCBrF.sub.2                                 
169   4-CH.sub.3  H         4-OCH.sub.2 CH.sub.2 F                        
170   4-CH.sub.3  H         4-OCH.sub.2 CF.sub.3                          
171   4-CH.sub.3  H         4-OCF.sub.2 CHF.sub.2                         
172   4-CH.sub.3  H         4-OCH.sub.2 CF.sub. 2 CHF.sub.2               
173   4-CH.sub.3  H         4-OCH.sub.2 CF.sub.2 CF.sub.3                 
174   4-CH.sub.3  H         4-OCF.sub.2 CHFCF.sub.3                       
175   4-CH.sub.3  H         4-CH.sub.2 OCBrF.sub.2                        
176   4-CH.sub.3  H         4-CH.sub.2 OCH.sub.2 CF.sub.3                 
177   4-CH.sub.3  H         4-OCClCCl.sub.2                               
178   4-CH.sub.3  H         4-OCFCHCl                                     
179   4-CH.sub.3  H         4-OCH.sub.2 CFCH.sub.2                        
180   4-CH.sub.3  H         4-OCH.sub.2 CClCH.sub.2                       
181   4-CH.sub.3  H         4-OCH.sub.2 CBrCH.sub.2                       
182   4-CH.sub.3  H         4-OCH.sub.2 CClCHCl(Z)                        
183   4-CH.sub.3  H         4-OCH.sub.2 CClCHCl(E)                        
184   4-CH.sub.3  H         4-SCH.sub.2 F                                 
185   4-CH.sub.3  H         4-SCHF.sub.2                                  
186   4-CH.sub.3  H         4-SCF.sub.3                                   
187   4-CH.sub.3  H         4-SCBrF.sub.2                                 
188   4-CH.sub.3  H         4-SCClF.sub.2                                 
189   4-CH.sub.3  H         4-SC(CF.sub.3).sub.2 CF.sub.2 CF.sub.2        
                            CF.sub.3                                      
190   4-CH.sub.3  H         4-CH.sub.2 SCH.sub.2 CF.sub.3                 
191   4-CH.sub.3  H         4-SCH.sub.2 CClCH.sub.2                       
192   4-CH.sub.3  H         4-CH.sub.2 CF.sub.3                           
193   4-CH.sub.3  H         4-CF.sub.2 CF.sub.3                           
194   4-CH.sub.3  H         4-CF.sub.2 CF.sub.2 CF.sub.3                  
195   4-CH.sub.3  H         4-CF(CF.sub.3).sub.2                          
196   4-CH.sub.3  H         4-CF.sub.2 (CF.sub. 2).sub.4 CF.sub.3         
197   4-CH.sub.3  H         4-CH.sub.2 C(CF.sub.3).sub.2 CF.sub.2         
                            CF.sub.2 CF.sub.3                             
198   4-CH.sub.3  H         4-CHCF.sub.2                                  
199   4-CH.sub.3  H         4-CHCCl.sub.2                                 
200   4-CH.sub.3  H         4-CHCBr.sub.2                                 
201   4-CH.sub.3  H         4-CHCClF                                      
202   4-CH.sub.3  H         4-CHCBrF                                      
203   4-CH.sub.3  H         4-CHCBrCl                                     
204   4-CH.sub.3  H         4-CFCF.sub.2                                  
205   4-CH.sub.3  H         4-CClCCl.sub.2                                
206   4-CH.sub.3  H         4-CBrCBr.sub.2                                
207   4-CH.sub.3  H         4-CHCClCF.sub.3                               
208   4-CH.sub.3  H         4-CCH.sub.3CF.sub.2                           
209   4-CH.sub.3  H         4-CCH.sub.3CCl.sub.2                          
210   4-CH.sub.3  H         4-CCH.sub.3CBr.sub.2                          
211   4-CH.sub.3  H         4-CH.sub.2 CFCH.sub.2                         
212   4-CH.sub.3  H         4-CH.sub.2 CClCH.sub.2                        
213   4-CH.sub.3  H         4-CH.sub.2 CBrCH.sub.2                        
214   4-CH.sub.3  H         4-COOCH(CH.sub.3).sub.2                       
215   4-CH.sub.3  H         4-COOC(CH.sub.3).sub.3                        
216   4-CH.sub.3  H         4-COOCH.sub.2 (CH.sub.2).sub.3 CH.sub.3       
217   4-CH.sub.3  H         4-COOCH.sub.2 (CH.sub.2).sub.6 CH.sub.3       
218   4-CH.sub.3  H         4-COOQ.sup.1                                  
219   4-CH.sub.3  H         4-COOQ.sup.2                                  
220   4-CH.sub.3  H         4-QQ.sup.3                                    
221   2-F         H         4-OCHF.sub.2                                  
222   2-F         H         4-OCF.sub.3                                   
223   2-F         H         4-OCBrF.sub.2                                 
224   2-F         H         4-OCH.sub.2 CF.sub.3                          
225   2-F         H         4-OCF.sub.2 CHF.sub.2                         
226   2-F         H         4-CH.sub.2 OCH.sub.2 CF.sub.3                 
227   2-F         H         4-OCClCCl.sub.2                               
228   2-F         H         4-OCH.sub.2 CClCH.sub.2                       
229   2-F         H         4-SCF.sub.3                                   
230   2-F         H         4-CF.sub.2 CF.sub.3                           
231   2-F         H         4-CHCCl.sub.2                                 
232   2-F         H         4-CHCClF                                      
233   2-F         H         4-CFCF.sub.2                                  
234   2-F         H         4-CClCCl.sub.2                                
235   2-F         H         4-CH.sub.2 CClCH.sub.2                        
236   2-F         H         4-COOC(CH.sub.3).sub.3                        
237   2-F, 4-CH.sub.3                                                     
                  H         4-OCF.sub.3                                   
238   2-F, 4-CH.sub.3                                                     
                  H         4-OCH.sub.2 CF.sub.3                          
239   2-F, 4-CH.sub.3                                                     
                  H         4-OCClCCl.sub.2                               
240   2-F, 4-CH.sub.3                                                     
                  H         4-OCH.sub.2 CClCH.sub.2                       
241   2-F, 4-CH.sub.3                                                     
                  H         4-SCF.sub.3                                   
242   2-F, 4-CH.sub.3                                                     
                  H         4-CF.sub.2 CF.sub.3                           
243   2-F, 4-CH.sub.3                                                     
                  H         4-CHCCl.sub.2                                 
244   2-F, 4-CH.sub.3                                                     
                  H         4-COOC(CH.sub.3).sub.3                        
245   2-F, 6-F    H         4-OCF.sub.3                                   
246   2-F, 6-F    H         4-OCH.sub.2 CF.sub.3                          
247   2-F, 6-F    H         4-OCClCCl.sub.2                               
248   2-F, 6-F    H         4-OCH.sub.2 CClCH.sub.2                       
249   2-F, 6-F    H         4-SCF.sub.2                                   
250   2-F, 6-F    H         4-CF.sub.2 CF.sub.3                           
251   2-F, 6-F    H         4-CHCCl.sub.2                                 
252   2-F, 6-F    H         4-COOC(CH.sub.3).sub.3                        
253   2-F, 4-CH.sub.3, 6-F                                                
                  H         4-OCF.sub.3                                   
254   2-F, 4-CH.sub.3, 6-F                                                
                  H         4-SCF.sub.3                                   
255   2-F, 4-CH.sub.3, 6-F                                                
                  H         4-CF.sub.2 CF.sub.3                           
256   H           3-F       4-OCHF.sub.2                                  
257   H           3-F       4-OCF.sub.3                                   
258   H           3-F       4-OCH.sub.2 CF.sub.3                          
259   H           3-F       4-OCH.sub.2 CF.sub.2 CF.sub.3                 
260   H           3-F       4-OCH.sub.2 CFCH.sub.2                        
261   H           3-F       4-OCH.sub.2 CClCH.sub.2                       
262   H           3-F       4-OCH.sub.2 CBrCH.sub.2                       
263   H           3-F       4-SCF.sub.3                                   
264   H           3-F       4-CF.sub.2 CF.sub.3                           
265   H           3-F       4-CH.sub.2 CClCH.sub.2                        
266   H           3-Cl      4-OCF.sub.3                                   
267   H           3-Cl      4-OCH.sub.2 CF.sub.3                          
268   H           3-Cl      4-OCH.sub.2 CF.sub.2 CF.sub.3                 
269   H           3-Cl      4-OCH.sub.2 CFCH.sub.2                        
270   H           3-Cl      4-OCH.sub.2 CClCH.sub.2                       
271   H           3-Cl      4-OCH.sub.2 CBrCH.sub.2                       
272   H           3-Cl      4-SCF.sub.3                                   
273   H           3-Cl      4-CF.sub.2 CF.sub.3                           
274   H           3-Cl      4-CH.sub.2 CClCH.sub.2                        
275   H           3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.3                          
276   H           3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.2 CF.sub.3                 
277   H           3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CFCH.sub.2                        
278   H           3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CClCH.sub.2                       
279   4-CH.sub.3  3-F       4-OCHF.sub.2                                  
280   4-CH.sub.3  3-F       4-OCF.sub.3                                   
281   4-CH.sub.3  3-F       4-OCH.sub.2 CF.sub.3                          
282   4-CH.sub.3  3-F       4-OCH.sub.2 CF.sub.2 CF.sub.3                 
283   4-CH.sub.3  3-F       4-OCH.sub.2 CFCH.sub.2                        
284   4-CH.sub.3  3-F       4-OCH.sub.2 CClCH.sub.2                       
285   4-CH.sub.3  3-F       4-OCH.sub.2 CBrCH.sub.2                       
286   4-CH.sub.3  3-F       4-SCF.sub.3                                   
287   4-CH.sub.3  3-F       4-CF.sub.2 CF.sub.3                           
288   4-CH.sub.3  3-Cl      4-OCF.sub.3                                   
289   4-CH.sub.3  3-Cl      4-OCH.sub.2 CF.sub.3                          
290   4-CH.sub.3  3-Cl      4-OCH.sub.2 CF.sub.2 CF.sub.3                 
291   4-CH.sub.3  3-Cl      4-OCH.sub.2 CFCH.sub.2                        
292   4-CH.sub.3  3-Cl      4-OCH.sub.2 CClCH.sub.2                       
293   4-CH.sub.3  3-Cl      4-OCH.sub.2 CBrCH.sub.2                       
294   4-CH.sub.3  3-Cl      4-SCF.sub.3                                   
295   4-CH.sub.3  3-Cl      4-CF.sub.2 CF.sub.3                           
296   4-CH.sub.3  3-Cl      4-CH.sub.2 CClCH.sub.2                        
297   4-CH.sub.3  3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.3                          
298   4-CH.sub.3  3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.2 CF.sub.3                 
299   4-CH.sub.3  3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CFCH.sub.2                        
300   4-CH.sub.3  3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CClCH.sub.2                       
301   2-F         3-F       4-OCH.sub.2 CF.sub.3                          
302   2-F         3-F       4-OCH.sub.2 CF.sub.2 CF.sub.3                 
303   2-F         3-F       4-OCH.sub.2 CFCH.sub.2                        
304   2-F         3-F       4-OCH.sub.2 CClCH.sub.2                       
305   2-F         3-F       4-OCH.sub.2 CBrCH.sub.2                       
306   2-F         3-F       4-CF.sub.2 CF.sub.3                           
307   2-F         3-Cl      4-OCF.sub.3                                   
308   2-F         3-Cl      4-OCH.sub.2 CF.sub.3                          
309   2-F         3-Cl      4-OCH.sub.2 CF.sub.2 CF.sub.3                 
310   2-F         3-Cl      4-OCH.sub.2 CFCH.sub.2                        
311   2-F         3-Cl      4-OCH.sub.2 CClCH.sub.2                       
312   2-F         3-Cl      4-OCH.sub.2 CBrCH.sub.2                       
313   2-F         3-Cl      4-SCF.sub.3                                   
314   2-F         3-Cl      4-CF.sub.2 CF.sub.3                           
315   2-F         3-Cl      4-CH.sub.2 CClCH.sub.2                        
316   2-F         3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.3                          
317   2-F         3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.2 CF.sub.3                 
318   2-F         3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CFCH.sub.2                        
319   2-F         3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CClCH.sub.2                       
320   2-F, 4-CH.sub.3                                                     
                  3-F       4-OCH.sub.2 CF.sub.3                          
321   2-F, 4-CH.sub.3                                                     
                  3-F       4-OCH.sub.2 CF.sub.2 CF.sub.3                 
322   2-F, 4-CH.sub.3                                                     
                  3-F       4-OCH.sub.2 CFCH.sub.2                        
323   2-F, 4-CH.sub.3                                                     
                  3-F       4-OCH.sub.2 CClCH.sub. 2                      
324   2-F, 4-CH.sub.3                                                     
                  3-F       4-OCH.sub.2 CF.sub.3                          
325   2-F, 4-CH.sub.3                                                     
                  3-F       4-OCH.sub.2 CClCH.sub.2                       
326   2-F, 4-CH.sub.3                                                     
                  3-F       4-OCH.sub.2 CBrCH.sub.2                       
327   2-F, 4-CH.sub.3                                                     
                  3-F       4-CF.sub.2 CF.sub.3                           
328   2-F, 4-CH.sub.3                                                     
                  3-Cl      4-OCF.sub.3                                   
329   2-F, 4-CH.sub.3                                                     
                  3-Cl      4-OCH.sub.2 CF.sub.3                          
330   2-F, 4-CH.sub.3                                                     
                  3-Cl      4-OCH.sub.2 CF.sub.2 CF.sub.3                 
331   2-F, 4-CH.sub.3                                                     
                  3-Cl      4-OCH.sub.2 CFCH.sub.2                        
332   2-F, 4-CH.sub.3                                                     
                  3-Cl      4-OCH.sub.2 CClCH.sub.2                       
333   2-F, 4-CH.sub.3                                                     
                  3-Cl      4-OCH.sub.2 CBrCH.sub.2                       
334   2-F, 4-CH.sub.3                                                     
                  3-Cl      4-SCF.sub.3                                   
335   2-F, 4-CH.sub.3                                                     
                  3-Cl      4-CF.sub.2 CF.sub.3                           
336   2-F, 4-CH.sub.3                                                     
                  3-Cl      4-CH.sub.2 CClCH.sub.2                        
337   2-F, 4-CH.sub.3                                                     
                  3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.3                          
338   2-F, 4-CH.sub.3                                                     
                  3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.2 CF.sub.3                 
339   2-F, 4-CH.sub.3                                                     
                  3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CFCH.sub.2                        
340   2-F, 4-CH.sub.3                                                     
                  3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CClCH.sub.2                       
341   2-F, 6-F    3-F       4-OCH.sub.2 CF.sub.3                          
342   2-F, 6-F    3-F       4-OCH.sub.2 CClCH.sub.2                       
343   2-F, 6-F    3-F       4-OCH.sub.2 CBrCH.sub.2                       
344   2-F, 6-F    3-F       4-CF.sub.2 CF.sub.3                           
345   2-F, 6-F    3-Cl      4-OCF.sub.3                                   
346   2-F, 6-F    3-Cl      4-OCH.sub.2 CF.sub.3                          
347   2-F, 6-F    3-Cl      4-OCH.sub.2 CClCH.sub.2                       
348   2-F, 6-F    3-Cl      4-OCH.sub.2 CBrCH.sub.2                       
349   2-F, 6-F    3-Cl      4-CF.sub.2 CF.sub.3                           
350   2-F, 6-F    3-Cl      4-OCH.sub.2 CClCH.sub.2                       
351   2-F, 6-F    3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.3                          
352   2-F, 6-F    3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.2 CF.sub.3                 
353   2-F, 6-F    3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CFCH.sub.2                        
354   2-F, 6-F    3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CClCH.sub.2                       
355   2-F, 4-CH.sub.3, 6-F                                                
                  3-F       4-OCH.sub.2 CF.sub.3                          
356   2-F, 4-CH.sub.3, 6-F                                                
                  3-Cl      4-OCH.sub.2 CClCH.sub.2                       
357   2-F, 4-CH.sub.3, 6-F                                                
                  3-Cl, 5-Cl                                              
                            4-OCH.sub.2 CF.sub.3                          
358   4-C.sub.2 H.sub.5                                                   
                  H         4-OCHF.sub.2                                  
359   4-C.sub.2 H.sub.5                                                   
                  H         4-OCF.sub.3                                   
360   4-C.sub.2 H.sub.5                                                   
                  H         4-OCH.sub.2 CF.sub.3                          
361   4-C.sub.2 H.sub.5                                                   
                  H         4-OCClCCl.sub.2                               
362   4-C.sub.2 H.sub.5                                                   
                  H         4-OCH.sub.2 CBrCH.sub.2                       
363   4-C.sub.2 H.sub.5                                                   
                  H         4-SCF.sub.3                                   
364   4-C.sub.2 H.sub.5                                                   
                  H         4-CF.sub.2 CF.sub.3                           
365   4-C.sub.2 H.sub.5                                                   
                  H         4-CHCCl.sub.2                                 
______________________________________                                    
 
    
     Q 1 , Q 2  and Q 3  in Table 1 show the following structural formulae. ##STR28## 
     Examples of the salts of the compounds of general formula (I) include inorganic acid salts such as hydrochlorides, hydrobromides, hydroiodides, hydrofluorides, sulfates, hydrogen sulfates, nitrates, chlorates, perchlorates, phosphates, hydrogen phosphates, dihydrogen phosphates, thiocyanates and tetrafluoroborates; and organic acid salts such as formates, acetates, trichloroacetates, trifluoroacetates, citrates, lactates, oxalates, glycollates, malonates, succinates, malates, dodecylbenzenesulfonates, benzoates, salicylates and nicotinates. 
     The compounds of this invention represented by general formula (I) can be produced by the following ##STR29## 
     (In the formulae, R 1 , R 2 , R 3 , m and n have the meanings defined hereinabove.) 
     The compounds of general formula (I) can be obtained by reacting the carbamoyl chloride derivative of general formula (II) with the thiourea derivative of general formula (III) in the absence or presence of a solvent, preferably in the presence of a solvent. Suitable solvents include, for example, acetone, methyl ethyl ketone, cyclohexanone, tetrahydrofuran, dioxane, ethyl ether, benzene, toluene, acetonitrile, ethanol, propanol, dichloromethane, chloroform, carbon tetrachloride, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, 1,3-dimethyl-2-imidazolidinone, water and other solvents which do not affect the reaction. 
     The reaction is carried out under heating or in the presence of a base. In the case of performing the reaction under heating, the reaction temperature can be varied over a wide range depending upon the starting 
     o , preferably 40 material. Generally, it is 30 to 250 C to 150° C. The reaction time is 0.1 to 30 hours, preferably 0.5 to 24 hours. 
     Suitable bases that may be used in performing the reaction include, for example, potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, sodium hydrogen carbonate, triethylamine, pyridine, N,N-dimethylaniline, 1,8-diazabicyclo-5,4,0)-7-undecene. The reaction temperature and the reaction time may be varied over broad ranges depending upon the starting material. Generally, the reaction temperature is --10 to 200° C, preferably room temperature to 150° C, and the reaction time is 0.1 to 30 hours, preferably 0.5 to 24 hours. 
     In performing the above reaction, the carbamoyl chloride derivative of general formula (II) and the thiourea derivative of general formula (III) may be used in equimolar proportions, or one of them may be used in slight excess. In the case of carrying out the reaction using the base and obtaining the compound of general formula (I) in a free form, it is preferred to use the base in an amount of 2 moles per mole of the carbamoyl chloride derivative of general formula (II), or in a slightly excessive molar proportion with respect to the compound (II). 
     The starting carbamoyl chloride derivative of general formula (II) may be synthesized by a known method Journal of Organic Chemistry, vol. 39, page 2897 (1974)]. The thiourea of formula (III) may also be synthesized by a known method. 
     The salts of the compounds of the invention represented by general formula (I) can be produced by a known method. Specifically, the salts can be obtained by treating the compounds of general formula (I) with an inorganic acid such as hydrochloric acid, hydrobromic acid, hydroiodic acid, hydrofluoric acid, sulfuric acid, nitric acid, chloric acid, perchloric acid, phosphoric acid, thiocyanic acid and tetrafluoroboric acid, or an orgnaic acid such as formic acid, acetic acid, trichloroacetic acid, trifluoroacetic acid, citric acid, lactic acid, oxalic acid, glycollic acid, malonic acid, succinic acid, malic acid, dodecylbenzenesulfonic acid, benzoic acid, salicylic acid and nicotinic acid. 
     The compounds of the present invention represented by general formula (I) and their salts can be used to protect plants from many kinds of noxious arthropods encountered in various fields, for example in agriculture, forestry and horticulture. 
     For example, the compounds of formula (I) are effective against hemipterous insect pests such as small brown planthopper, brown planthopper, whitebacked planthopper, green rice leafhopper, zig-zag rice leafhopper, tea green leafhopper, ]umping plantlice, westwood-greenhouse whitefly, citrus spiny whitefly, green peach aphid, cotton aphid, cabbage aphid, spiraea aphid, lace bug, bean bug, cletus punctiger Dallas, rice bug, whitespotted bug, southern green stink bug, arrowhead scale, San jose scale, and white peach scale; lepidopterous insect pests such as rice stem borer, rice leafroller, oriental corn borer, rice skipper, green rice caterpillar, apple leafminer, beet semi-looper, black cutworm, cutworm, summer fruit tortrix, apple leafroller, peach fruit moth, citrus leafminer, pear leafminer, cherry treeborer, gypsy moth, fall webworm, cabbage moth, rice armyworm, cabbage armyworm, tobacco cutworm and common cabbageworm; coleopterous insect pests such as cupreous chafer, soybean beetle, Japanese beetle, citrus flower chafer, rice water weevil, rice plant weevil and sugarcane wireworm; dipterous insect pests such as rice crane fly, soybean pod gall midge, melon fly, oriental fruit fly, rice leafminer, stone leek leafminer, bryony leafminer, onion maggot and seedcorn maggot; and thrips such as yellow tea thrips, Thrips palmi Karny and onion thrips; and mites such as two-spotted spider mite, Kanzawa spider mite, carmine spider mite, citrus red mite, fruittree red spider spider mite, hawthorn spider mite and broad mite. 
     They are also effective against pests which cause various damages to man and domestic animals, for example, the transmission of epidemics, blood sucking, stinging and biting and skin inflammation, such as house mosquito, Culex pipiens molestus, Culex tritaeniorhyncus, Aedes albopictus, house flies, Boettcherisca pereqrina Robineau-Desvoidy, Calliphora lata Coquillett, Phormia regina Meigen, Drosophila melanogaster, American cockroach, German cockroach, smokybrown cockroach, Periplaneta brunnea Burmeister, Japanese cockroach, Ornithonyssus bacoti Hirst, human louse, Pediculus humanus humanus De Geer, Climex lectularus Linne, human flea, dog flea, cat flea, oriental tussock moth, tea tussock moth, Scolopendra subspinipes japonica, rove beetle, and Xanthochroa waterhousei Harold; pests which damage foods or stored grains, such as mold mite, bread beetle, confused flour beetle, maize weevil, azuki bean weevil, common hide beetle and Indian meal moth; pests which damages furniture, building materials, books and apparel such as Reticulitermes speratus Kolbe, Formosan subterranean termite, powderpost beetle, Gastrallus immarginatus Mullerr, casemaking clothes moth and black carpet beetle; and so-called &#34;unpleasant pests&#34;, such as Telmatoscopus albipunctatus Williston, Chironomus plumosus Linnaeus, midges, camel crickets, brown marmorated stink bug, Thereuronema hilgendorfi Verhoeff, Oxidus gracilis C. L. Koch, pillbug and Porcellio scaber Latreille. 
     The compounds of this invention show much higher insecticidal activity on lepidopterous insect pests than known compounds. 
     In actual application, the compound of the invention may be used singly without other components, but to make it easy to use as a control agent, it is generally applied as a mixture with a carrier. Formulation of the compound of the invention requires no particular conditions, and it may be prepared in any desired form such as an emulsifiable concentrate, a wettable powder, a dust, granules, a pulverulent agent, an oil, an aerosol, a fumigant or a bait by methods well known to those skilled in the art in accordance with the formulation of general agricultural chemicals. 
     The carrier, as used herein, denotes a synthetic or natural inorganic or organic material which is incorporated in order to aid in the arrival of the active ingredient at a site to be treated or facilitate storage, transportation and handling of the active ingredient compound. 
     Suitable solid carriers include, for example, clays such as montmorillonite and kaolinite; inorganic materials such as diatomaceous earth, terra alba, talc, vermiculite, gypsum, calcium carbonate, silica gel and ammonium sulfate, organic plant materials such as soybean meal, sawdust and wheat flour; and urea. 
     Suitable liquid carriers include, for example, aromatic hydrocarbons such as toluene, xylene and cumene, paraffinic hydrocarbons such as kerosene and mineral oils, halogenated hydrocarbons such as carbon tetrachloride, chloroform and dichloroethane, ketones such as acetone and methyl ethyl ketone, ethers such as dioxane and tetrahydrofuran, alcohols such as methanol, ethanol, propanol and ethylene glycol, dimethylformamide, dimethyl sulfoxide, and water. 
     To enhance the efficacy of the compounds of this invention, various adjuvants, either singly or in combination, may be combined with the compounds of the invention according to the formulation of the compounds, the situation in which they are applied, etc. 
     For the purpose of emulsification, dispersion, spreading, wetting, binding and stabilization, there may be used anionic surface-active agents such as lignosulfonates, alkylbenzenesulfonates and alkylsulfates; nonionic surface-active agents such as polyoxyalkylene alkyl ethers, polyoxyalkylene alkyl aryl ethers, polyoxyalkylene alkylamines, polyoxyalkylene alkylamides, polyoxyalkylene alkyl thioethers, polyoxyalkylene fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyalkylene sorbitan fatty acid esters and polyoxypropylene polyoxyethylene block polymers; lubricants such as calcium stearate and waxes; stabilizers such as isopropyl hydrogen phosphate; and methyl cellulose, carboxymethyl cellulose, casein and gum arabic. These examples, however, are not limitative. 
     Better insecticidal and acaricidal activities may be obtained by using two or more compounds of this invention in combination. Furthermore, multipurpose compositions having a better efficacy may be prepared by mixing the compounds of the invention with other insecticides or acaricides, fungicides, nematocides, herbicides, plant growth regulating agents, fertilizers, machine oils and other agricultural chemicals. Synergistic effects can be expected from such compositions. Examples of the other insecticides or acaricides include fenthion, fenitrotion, diazinon, chlorpyrifos, chlorpyrifos-methyl, methidathion, dichlorvos, thiometon, acephate, trichlorphon, isoxathion, pyridafenthion, salithion, prothiofos, propaphos, EPN, sulprofos, NAC, MTMC, MIPC, BPMC, PHC, MPMC, XMC, pirimicarb, carbosulfan, benfuracarb, methomyl, oxamyl, pyrethrin, tetramethrin, phthalthrin, vaporthrin, allethrin, resmethrin, fenvalerate, esfenvalerate, permethrin, cypermethrin, fluvalinate, ethofenprox, flucythrinate, cyhalothrin, bifenthrin, diflubenzuron, chlorfluazuron, teflubenzuron, flufenoxuron, cypromazine, buprofezin, fenoxycarb, benzoepin, nereistoxin, bensultap, thiocyclam, avermectin, dicofol, amitraz, polynactins, fenbutatin oxide, cyhexatin, hexythiazox, flubenzamine, triarathene, clofentezine and milbemycin. 
     The compounds of this invention are stable to light, heat and oxidation. If required, however, suitable amounts of stabilizers, for example antioxidants or ultraviolet absorbers such as phenol derivatives [e.g., BHT (2,6-di-t-butyl-4-methylphenol) and BHA (butylhydroxyanisole)), bisphenol derivatives, arylamines (e.g., phenyl-α-naphthylamine, phenyl-β-naphthylamine, or a condensate of phenetidine and acetone), and benzophenone compounds may be added. This can give a composition having a more stabilized efficacy. 
     In the insecticidal and acaricidal agent of this invention, 0.1 to 95 % by weight, preferably 0.3 to 50 % by weight, of the compound of formula (I) or its salt is included as an active ingredient. In applying the insecticidal and acaricidal agent of this invention, the active ingredient is desirably used in a concentration of 0.01 to 5000 ppm, preferably 0.1 to 1000 ppm. The rate of application per 10 a is generally 1 g to 300 g as the active ingredient. 
     Contemplated equivalents of the compounds of this invention are those otherwise corresponding to formula (I) having one or more additional simple substituents on the benzyl and/or phenyl rings thereof, e.g , a substituent having one of the values of R 3 , or a variation of the R 3  substituent, an alkyl group other than an alkyl having 1 to 4 carbon atoms, e.g., octyl, a substituted or fused ring cycloalkyl group; an alkoxy group other than an alkoxy having 1 to 4 carbon atoms, e.g., 2,2-dimethyl-propanoxy, n-octylox; an alkanoyl group other than acetyl, e.g., propanoyl or higher alkanoyl; an aryloxy group other than halo-substituted phenoxy, e.g., naphthoxy or biphenyloxy; an arylcarbonyl group other than phenylcarbonyl, e.g., ring substituted benzoyl; a haloalkyloxy group other than a haloalkyloxy having 1 to 4 carbon atoms, e.g., a halocycloalkyloxy group; a haloalkyloxyalkyl group other than a haloalkyloxymethyl having 1 to 4 carbon atoms, e.g., a halocycloalkyloxymethyl group, a haloalkyloxyethyl group; a haloalkynyloxy group other than a haloalkenyloxy having 2 to 4 carbon atoms, e.g., 3-trifluoromethyl-1-propynyloxy; a haloalkylthio group other than a haloalkylthio having 1 to 4 carbon atoms, e.g., a halocycloalkylthio group; a haloalkylthiomethyl group other than a haloalkylthiomethyl having 1 to 4 carbon atoms, e.g., a halocycloalkylthiomethyl group, a haloalkylthioethyl group; a haloalkynylthio group other than a haloalkenylthio having 2 to 4 carbon atoms, e.g., 3-trifluoromethyl-1-propynylthio; a haloalkyl group other than a haloalkyl having 2  to 4 carbon atoms, e.g., a halocycloalkyl group; a haloalkynyl group other than a haloalkenyl having 2 to 4 carbon atoms, e.g., 3-trifluoromethyl-1-propynyl; an alkenyloxycarbonyl group or an alkynyloxycarbonyl group other than alkyloxycarbonyl having 1 to 8 carbon atoms, e.g., allyloxycarbonyl, propargyloxycarbonyl; ring substituted pyrazoloxy, ring substituted pyrimidinoxy, ring substituted pyridazinoxy, ring substituted pyrazinoxy or ring substituted triazinoxy other than ring substituted pyridinoxy. 
    
    
     The following examples illustrate the present invention more specifically. 
     EXAMPLE 1 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-t-butylbenzyl)-5-phenyl-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 6) 
     A solution of 0.65 g of trichloromethyl chloroformate in 10 ml of benzene was added dropwise to a solution of 0.69 g of 1,3,5-triphenyl-hexahydro-s-triazine in 20 ml of tetrahydrofuran with stirring at room temperature in a nitrogen stream. The solution was stirred at room temperature for 1.5 hours. Then, 2.00 g of 1-(4-t-butylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea was added at room temperature with stirring, and subsequently, 6 ml of a 10 % aqueous solution of sodium hydroxide was added. The mixture was stirred at room temperature for 12 hours. Water (30 ml) was added to the reaction mixture, and it was extracted with 150 ml of ethyl acetate. The ethyl acetate solution was washed with water, and dried. Ethyl acetate was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; eluent: hexane/ethyl acetate (10/1)) to give 0.42 g of the captioned compound. 
     Melting point: 113.0-114.0° C. 
     IR ν KBr   max  (cm -1 ) 2960, 1665, 1605, 1490, 1460, 1420, 1400, 1385, 1295, 1275, 1265, 1210, 1170, 1145, 1130, 1120, 1090, 950, 715. 
       1  H NMR δ CDCl   TMS  3 (ppm) 3(9H, s), 3.84(2H, q, J=9Hz), 4.87(2H, s), 5.32 (2H, s), 7.2-7.6(9H, m). 
     As an isomer, 0.37 g of 2-(4-t-butylbenzylimino)-3-(2,2,2-trifluoroethyl)-5-phenyl-tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Melting point: 90.0-91.5° C. 
     IR ν KBr   max  (cm -1 ) 2960, 1670, 1610, 1490, 1450, 1390, 1365, 1335, 1260, 1200, 1160, 1120, 750. 
       1  NMRδ CDCl   TMS  3 (ppm): 4.57(2H, s), 4.92 (2H, s), 5.16(2H, q J=9Hz), 7.2-7.6(9H, m). 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-t-butylbenzyl)-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 12) 
     A solution of 1.42 g of trichloromethyl chloroformate in 20 ml of benzene was added dropwise to a solution of 1.72 g of 1,3,5-tris(4-methylphenyl)-hexahydro-s-triazine in 30 ml of tetrahydrofuran at room temperature with stirring in a nitrogen stream. The reaction solution was stirred at room temperature for 1 hour. Then, 4.0 g of 1-(4-t-butylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea was added at room temperature with stirring, and subsequently 12 ml of a 10% aqueous solution of sodium hydroxide was added. The mixture was stirrerd at room temperature for 6 hours. Water (50 ml) was added to the reaction mixture, and it was extracted with 200 ml of ethyl acetate. The ethyl acetate layer was washed with water and dried, and ethyl acetate was evaporated under reduced pressure. The resulting oily product was purified by column chromatography [silica gel; eluent: hexane/ethyl acetate (10/1)) to give 0.79 g of the captioned compound. 
     Refractive index n 20   D  : 1.5464IRν neat   max  (cm -1 ) 2960, 1690, 1615, 1515, 1450, 1395, 1290, 1270, 1210, 1150, 1090, 940, 850, 825, 755, 725. 
       1  H NMRδ CDCl   3  /TMS (ppm): 1.34(9H, s), 2.36(3H, s), 3.81 (2H, q, J=9Hz), 4.79(2H, s), 5.27(2H, s), 7.18-7.35(8H, m). 
     As an isomer, 1.29 g of 2-(4-t-butylbenzyl-imino)-3-(2,2,2-trifluoroethyl)-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Refractive index n 20   D  : 1.5537. 
     IRν neat   max  (cm -1 ) 2960, 1700, 1620, 1515, 1450, 1395, 1335, 1305, 1270, 1210, 1160, 1120, 1080, 1045, 1020, 835, 820, 770. 
       1  NMR δ CDCl   3  /TMS (ppm): 1.36(9H, s), 2.36(3H, s), 4.52 (2H, s), 4.84(2H, s), 5.11(2H, q, J=9Hz), 7.18-7.41(8H. m). 
     EXAMPLE 3 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-trifluoromethylbenzyl)-5-phenyl-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 37) 
     A solution of 2.5 g of trichloromethyl chloroformate in 10 ml of benzene was added dropwise to a solution of 2.65 g of 1,3,5-triphenyl-hexahydro-s-triazine in 20 ml of tetrahydrofuran at room temperature with stirring in a nitrogen stream. The reaction solution was stirred at room temperature for 1.5 hours. Then, 4.00 g of 1-(4-trifluoromethylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea was added at room temperature with stirring, and subsequently 15 ml of a 10 % aqueous solution of sodium hydroxide was added. The mixture was stirred at room temperature for 12 hours. Water (30 ml) was added to the reaction mixture, and it was extracted with 150 ml of ethyl acetate. The ethyl acetate solution was washed with water and dried. Under reduced pressure, ethyl acetate was evaporated. The resulting oily product was purified by column chromatography [slica gel; eluent: hexane/ethyl acetate (10/1)) to give 1.34 g of the captioned compound as a semisolid. 
     IRν neat   max  (cm -1 ) 1680, 1615, 1500, 1450, 1390, 1330, 1270, 1140, 1125, 1065, 1015, 935, 840, 755. 
       1  H NMRδ CDCl   3  /TMS (ppm): 3.80(2H, q, J=9Hz), 4.88(2H, s), 5.23(2H, s), 7.18-7.50(9H, m). 
     As an isomer, 0.76 g of 2-(4-trifluoromethyl-benzylimino)-3-(2,2,2-trifluoroethyl)-5-phenyl-tetra-hydro-1,3,5-thiadiazin-4-one was obtained. 
     Melting point: 127.0-128.0 
     IR ν KBr   max  (cm -1 ) 1695, 1625, 1500, 1455, 1400, 1325, 1280, 1160, 1120, 1070, 1025, 835, 825, 755. 
       1  H NMR δ CDCl   3  /TMS (ppm) 4.60(2H, s), 4.90(2H, s), 5.11 (2H, q, J=9Hz), 7.26-7.44(9H, m). 
     EXAMPLE 4 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-trifluoromethylbenzyl)-5-(2-fluorophenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 38) 
     A solution of 1.00 g of trichloromethyl chloroformate in 20 ml of benzene was added dropwise to a solution of 1.23 g of 1,3,5-tris(2-fluorophenyl)-hexahydro-s-triazine in 30 ml of tetrahydrofuran at room temperatue with stirring in a nitrogen stream. The reaction solution was stirred at room temperature for 1 hour. Then, 3.16 g of 1-(4-trifluoromethylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea was added with stirring at room temperature, and subsequently, 1.5 ml of triethylamine was added. The mixture was stirred at room temperature for 6 hours. Water (50 ml) was added to the reaction mixture, and it was extracted with 200 ml of ethyl acetate. The ethyl acetate solution was washed with water and dried. Under reduced pressure, ethyl acetate was evaporated. The resulting oily product was purified by column chromatography silica gel; eluent: hexane/ethyl acetate (10/1)) to give 0.20 g of the captioned compound. 
     Refractive index n 20   D  : 1.5225. 
     IRν neat   max  (cm -1 ): 1690, 1620, 1505, 1450, 1400, 1330, 1290, 1275, 1265, 1260, 1240, 1150, 1130, 1090, 1070, 1020, 940, 845, 760. 
       1  H NMRδ CDCl   3  /TMS (ppm): 3.72(2H, q, J=9Hz), 4.72 (2H, s), 5.29(2H, s), 7.00-7.50(4H, m), 7.51 (4H, s). 
     As an isomer, 0.30 g of 2-(4-trifluoromethyl-benzylimino)-3-(2,2,2-trifluoroethyl)-5-(2-fluorophenyl)-tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Refractive index: n 20   D  =1.5291. 
     IR ν neat   max  (cm -1 ) 1700, 1620, 1505, 1445, 1415, 1400, 1325, 1275, 1260, 1235, 1160, 1125, 1110, 1065, 1020, 830, 760. 
       1  H NMR δ CDCl   3  /TMS (ppm) 4.52(2H, s), 4.77(2H, s), 5.11 (2H, q, J=10Hz), 6.90-7.70(8H, m). 
     EXAMPLE 5 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-trifluoromethylbenzyl)-5-(3-methylphenyl)-tetra-hydro-1,3,5-thiadiazin-4-one (compound No. 39) 
     A solution of 1.00 g of trichloromethyl chloroformate in 10 ml of benzene was added dropwise to a solution of 1.19 g of 1,3,5-tris(3-methylphenyl)-hexahydro-s-triazine in 20 ml of tetrahydrofuran at room temperature with stirring in a nitrogen stream. The reaction mixture was stirred at room temperature for 1.5 hours. Then, 3.16 g of 1-(4-trifluoromethylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea was added at room temperature with stirring, and subsequently, 4.0 ml of triethylamine was added. The mixture was stirred at room temperature for 12 hours. Aqueous ammonia (30 ml) was added to the reaction mixture, and it was extracted with 150 ml of ethyl acetate. The ethyl acetate solution was washed with water and dried. Under reduced pressure, ethyl acetate was evaporated. The resulting oily product was purified by column chromatography silica gel; eluent: hexane/ethyl acetate (10/1)]to give 0.54 g of the captioned compound. 
     Refractive index n 20   D  : 1.5340. 
     IRν neat   max  (cm -1 ) 1680, 1610, 1490, 1445, 1380, 1315, 1265, 1255, 1105, 1065, 1045, 1025, 935. 
       1  H NMR δ CDCl   3  /TMS (ppm): 2.40(3H, s), 3.82 (2H, q, J=9Hz), 4.86(2H, s), 5.36(2H, s), 7.00-7.50 (4H, m), 7.60(4H, s). 
     As an isomer, 0.31 g of 2-(4-trifluoromethyl-benzylimino)-3-(2,2,2-trifluoroethyl)-5-(3-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Melting point: 97.0-98.0° C. 
     IRν neat   max  (cm -1 ) 1690, 1615, 1490, 1440, 1415, 1390, 1325, 1270, 1260, 1155, 1110, 1065, 1015. 
       1  H NMR δ CDCl   3  /TMS (ppm) 2.39(3H, s), 4.57(2H, s), 4.88 (2H s), 5.15(2H, q, J=10Hz), 7.00-7.80(8H, m). 
     EXAMPLE 6 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-trifluoromethylbenzyl)-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 40): 
     1.00 g of N-chloromethyl-N-(4-methylphenyl)carbamoyl chloride and 1.45 g of 1-(4-trifluoromethylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 30 ml of benzene, and the solution was heated under reflux for 4 hours. After the reaction, benzene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography [silica gel; eluent: hexane/ethyl acetate (10/1)] to give 1.27 g of the captioned compound. 
     Melting point: 62.0-63.0° C. 
     This product was washed with small amount of hexane and dried to give crystals having a melting point of 77.0-78.5° C. 
     IRν KBr   max  (cm -1 ) 1675, 1610, 1510, 1440, 1390, 1325, 1285, 1265, 1205, 1135, 1105, 1060, 1015, 935, 840, 815, 740. 
       1  H NMR δ CDCl   3  /TMS (ppm): 2.38(3H, s), 3.78(2H, q, J=9Hz), 4.80(2H, s), 5.35(2H, s), 7.23(4H, s), 7.57(4H, s). 
     As an isomer, 0.30 g of 2-(4-trifluoromethyl-benzylimino)-3-(2,2,2-trifluoroethyl)-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Melting point: 97.0-98.5° C. 
     IRν KBr   max  (cm -1 ): 1675, 1590, 1505, 1440, 1405, 1390, 1410, 1405, 1390, 1315, 1295, 1260, 1150, 1105, 1060. 
       1  H NMR δ CDCl   3  /TMS (ppm): 2.40(3H, s), 4.58(2H, s), 4.86 (2H, s), 5.15(2H, q, J=10Hz), 7.24(4H, s), 7.50(2H, d, J=8Hz), 7.65(2H, d, J=8Hz). 
     EXAMPLE 7 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-isopropyloxybenzyl)-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 27) 
     1.00 g of N-chloromethyl-N-(4-methylphenyl)carbamoyl chloride and 1.40 g of 1-(4-isopropyloxybenzyl)-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 30 ml of benzene, and the solution was heated under reflux for 4 hours. After the reaction, benzene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; eluent: hexane/ethyl acetate (10/1)1 to give 0.75 g of the captioned compound. 
     Refractive index n 20   D  : 1.5462. 
     IR ν neat   max  (cm -1 ) 1690, 1610, 1510, 1445, 1380, 1260, 1240, 1135, 1080, 1035, 950, 935, 840, 815. 
       1  H NMR δ CDCl   3  /TMS (ppm): 1.31(6H, d, J=6Hz), 2.36(3H, s), 3.81(2H, q, J=9Hz), 4.39-4.62(lH, m), 4.75 (2H, s), 5.26(2H, s), 6.80(2H, d, J=8Hz), 7.18(4H, s), 7.39(2H, d, J=8Hz). 
     As an isomer, 0.6 g of 2-(4-isopropyloxybenzyl-imino)-3-(2,2,2-trifluoroethyl)-5-(4-methylphenyl)-tetra-hydro-1,3,5-thiaziazin-4-one was obtained. 
     Melting point: 110.0-112.5° C. 
     IRν neat   max  (cm -1 ) 1690, 1610, 1510, 1440, 1385, 1260, 1240, 1150, 1110, 1070, 1040, 1015, 950, 820. 
       1  H NMR δ CDCl   3  /TMS (ppm): 1.36(6H, d, J=6Hz), 2.37(3H, s), 4.44(2H, s), 4.38-4.61(lH, m), 4.80(2H, s), 5.10(2H, q, J=10Hz), 6.86(2H, d, J=8Hz), 7.18 (4H, s), 7.23(2H, d, J=8Hz). 
     EXAMPLE 8 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(3,4-dichlorobenzyl)-5-phenyl-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 35) 
     1.00 g of N-chloromethyl-N-phenylcarbamoyl chloride and 1.55 g of 1-(3,4-dichlorobenzyl)-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 30 m1 of benzene, and the solution was heated under reflux. After the reaction, benzene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; eluent: hexane/ethyl acetate (10/1)] to give 0.88 g of the captioned compound. 
     Melting point: 99.1-99.6° C. 
     IRν KBr   max  (cm -1 ) 1675, 1665, 1610, 1390, 1285, 1265, 1135, 1120, 1085, 1030, 990, 930, 750, 720, 690. 
       1  H NMR δCDCl 3  /TMS (ppm): 3.80(2H, q, J=9Hz), 4.88(2H, s), 5.20(2H, s), 7.27-7.61(8H, m). 
     As an isomer, 0.20 g of 2-(3,4-dichlorobenzylimino)-3-(2,2,2-trifluoroethyl)-5-phenyl-tetrahydro-1,3,5-thiadiazin-4-one was obtained as a semisolid. 
     IR ν neat   max  (cm -1 ) 1695, 1620, 1505, 1495, 1470, 1445, 1390, 1330, 1265, 1210, 1155, 1115, 1080, 1030, 835, 815, 760. 
       1  H NMR δCDCl 3  /TMS (ppm): 4.48(2H, s), 4.90(2H, s), 5.08 (2H, q, J=10Hz), 7.10-7.41(8H, m). 
     EXAMPLE 9 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3(4-trifluoromethylbenzyl)-5-(2-fluoro-4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 41) 
     0.60 g of N-chloromethyl-N-(2-fluoro-4-methylphenyl)carbamoyl methylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 30 ml of toluene, and the solution was heated under reflux for 4 hours. After the reaction, toluene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; eluent: hexane/ethyl acetate (10/1)) to give 0.50 g of the captioned compound as a semisolid. 
     IR ν neat   max  (cm -1 ): 1690, 1620, 1515, 1450, 1400, 1330, 1270, 1140, 1090, 1070, 1020, 940, 850, 825, 765, 750, 725, 710. 
       1  H NMR δCDCl 3  /TMS (ppm): 2.35(3H, s), 3.78(2H, q, 8Hz), 4.74(2H, s), 5.30(2H, s), 6.96-7.33 (3H, m), 7.61(4H, s). 
     As an isomer, 0.17 g of 2-(4-trifluoro-methylbenzylimino)-3-(2,2,2-trifluoroethyl)-5-(2-fluoro-4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Melting point: 115-116° C. 
     IR ν KBr   max  (cm -1 ) 1690, 1630, 1515, 1450, 1400, 1330, 1310, 1255, 1170, 1110, 1070, 1045, 1015, 945, 830, 825, 765, 745. 
       1  H NMRδCDCl 3  /TMS (ppm) 2.36(3H, s), 4.55(2H, s), 4.77(2H, s), 5.10(2H, q, J=10Hz), 6.96-7.36 (3H, m), 7.50(2H, d, J=9Hz), 7.70(2H, d, J=9Hz). 
     EXAMPLE 10 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-phenoxybenzyl)-5-phenyl-tetrahydro-1,3,5-thiadiazin-one (compound No. 43) 
     1.00 g of N-chloromethyl-N-phenylcarbamoyl chloride and 1.67 g of 1-(4-phenoxybenzyl)-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 30 ml of benzene, and the solution was heated under reflux for hours. After the reaction, benzene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography [silica gel; eluent: solvent: hexane/ethyl acetate (10/1)]to give 0.87 g of the captioned compound. 
     Refractive index n 20   D  : 1.5903. 
     IRν neat   max  (cm -1 ) 1680, 1610, 1590, 1500, 1490, 1445, 1390, 1285, 1270, 1265, 1230, 1205, 1165, 
       1  H NMR δCDCl 3  /TMS (ppm) 3.81(2H, q, J=8Hz), 4.81 (2H, s), 5.23(2H, s), 6.80-7.50(14H, m). 
     As an isomer, 0.15 g of 2-(4-phenoxybenzyl-imino)-3-(2,2,2-trifluoroethyl)-5-phenyl-tetrahydro1,3,5-thiadiazin-4-one was obtained. 
     Refractive index n 20   D  : 1.5845 
     IR ν neat   max  (cm -1 ) 1700, 1620, 1590, 1505, 1495, 1445, 1390, 1335, 1305, 1275, 1265, 1240, 1205, 1160, 1120. 
       1  H NMR δCDCl 3  /TMS (ppm) 4.49(2H s) 4 85(2H s) 5.08(2H, q, J=9Hz), 6.80-7.60(14H, m). 
     EXAMPLE 11 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-trifluoromethoxybenzyl)-5-phenyl-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 71) 
     0.61 g of N-chloromethyl-N-phenylcarbamoyl chloride and 1.00 g of 1-(4-trifluoromethoxybenzyl)-(2,2,2-trifluoroethyl)thiourea were dissolved in 30 ml of benzene, and the solution was heated under reflux for 4 hours. After the reaction, benzene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent: hexane/ethyl acetate (10:1)) to give 0.68 g of the captioned compound. 
     Melting point: 54.0-56.0 ° C. 
     IR ν KBr   max  (cm -1 ) 1675, 1665, 1610, 1500, 1450, 1395, 1260, 1140, 1120, 930, 840, 765. 
       1  H NMR δCDCl 3  /TMS (ppm): 3.78(2H, q, J=9Hz), 4.84 (2H, s), 5.25(2H, s), 7.04-7.91(9H, m). 
     As an isomer, 0.17 g of 2-(4-trifluoromethoxy-benzylimino)-3-(2,2,2-trifluoroethyl)-5-phenyl-tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Melting point: 84.0-87.0° C. 
     IRν KBr   max  (cm -1 ) 1690, 1615, 1505, 1495, 1440, 1390, 1260, 1170, 1120, 835, 820, 755. 
       1  H NMR δCDCl 3  / TMS (ppm) 4.52(2H, s), 4.69(2H, s), 5.09(2H, q, J=9Hz), 7.11-7.36(9H, m). 
     EXAMPLE 12 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3(4-difluoromethoxybenzyl)-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 165) 
     0.69 g of N-chloromethyl-N-(4-methylphenyl)carbamoyl chloride and 1.00 g of 1-(4-difluoromethoxybenzyl)-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 30 ml of toluene, and the solution was heated under reflux for 4 hours. After the reaction, toluene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (10:1)]to give 0.80 g of the captioned compound. 
     Refractive index n 20   D  : 1.5461. 
     IR ν neat .sub.  max (cm -1 ) 1680, 1620, 1515, 1450, 1400, 1270, 1130, 1090, 1045, 940, 850, 820, 755. 
       1  H NMR δCDC1 3  /TMS (ppm): 2.33(3H, s), 3.75(2H, q, J=9Hz), 4.75(2H, s), 5.18(2H, s), 6.39(lH, t, J=74Hz), 6.90-7.44(8H, m). 
     As an isomer, 0.19 g of 2-(4-difluoromethoxybenzylimino)-3-(2,2,2-trifluoroethyl)-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Melting point: 88.5-90.0° C. 
     IR ν KBr   max  (cm -1 ) 10, 1685, 1620, 1520, 1445, 1390, 1265, 1175, 1120, 1050, 830. 
       1  H NMR δCDCl 3  /TMS (ppm): 2.36(3H, s), 4.46(2H, s), 4.79(2H, s), 5.04(2H, q, J=9Hz), 6.33(lH, t, J=74Hz), 6.97-7.28(8H, m). 
     EXAMPLE 13 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-trifluoromethylthiobenzyl)-5-phenyl-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 91) 
     A solution of 1.77 g of trichloromethyl chloroformate in 10 ml of benzene was added dropwise to a solution of 1.89 g of 1,3,5-triphenyl-hexahydro-striazine with stirring at room temperature under a nitrogen current. The reaction solution was stirred at room temperature for 1.5 hours. Then, 3.0 g of 1-(4-trifluoromethylthiobenzyl)-3-(2,2,2-trifluoroethyl)thiourea was added to the solution at room temperature with stirring, and subsequently, 1.5 ml of triethylamine was added. The mixture was stirred at room temperature for 12 hours. Aqueous ammonia (30 ml) was added to the reaction solution, and the mixture was extracted with 150 ml of ethyl acetate. The ethyl acetate solution was washed with water and dried, and ethyl acetate was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (10:1)) to give 0.47 g of the captioned compound. 
     Melting point: 89.5-90.0° C. 
     IR ν KBr   max  (cm -1 ) 1660, 1605, 1500, 1490, 1430, 1395, 1285, 1270, 1215, 1140, 1120, 1085, 930, 840, 750, 715. 
       1  H NMR δCDCl 3  / TMS (ppm): 3.80(2H, q, J=9Hz), 4.84 (2H, s), 5.32(2H, s), 7.20-7.60(9H, m). 
     As an isomer, 0.11 g of 2-(4-trifluoromethylthiobenzylimino)-3-(2,2,2-trifluoroethyl)-5-phenyltetrahydro-1,3,5-thiadiazin-4-one was obtained as a semisolid. 
     IR ν KBr   max  (cm 1695, 1615, 1490, 1440, 1390, 1335 1255, 1170, 1150, 1120, 1080, 810, 755, 715. 
       1  H NM CDCl 3  / TMS (ppm): 4.28(2H, s), 4.78(2H, s), 5.01(2H, q, J=9Hz), 7.10-7.49(9H, m). 
     EXAMPLE 14 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(2,2,2-trifluoroethoxy)benzyl)-5-phenyl-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 75) 
     A solution of 1.00 g of trichloromethyl chloroformate in 10 ml of benzene was added dropwise to a solution of 1.08 g of 1,3,5-triphenyl-hexahydro-s-triazine in 20 ml of tetrahydrofuran with stirring at room temperature under a nitrogen current. The reaction solution was stirred at room temperature for 1.5 hours, and then 3.46 g of 1-4-(2,2,2-trifluoroethoxy)benzyl]-3-(2,2,2-trifluoroethyl)thiourea was added at room temperature with stirring, and subsequently, 5.0 ml of triethylamine was added. The mixture was stirred at room temperature for 12 hours. Water (30 ml) was added to the reaction mixture, and the mixture was extracted with 150 ml of ethyl acetate. The ethyl acetate solution was washed with water and dried, and ethyl acetate was evaporated under reducd pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (10:1)) to give 0.56 g of the captioned compound. 
     Refractive index n 20   D  : 1.5324. 
       1  R ν KBr   max  (cm -1 ) 1670, 1605, 1505, 1450, 1440, 1380, 1350, 1260, 1250, 1225, 1200, 1170, 1150, 1130, 1110, 1080, 1070, 965. 
       1  H NMR δCDCl 3  /TMS (ppm) 3.80(2H, q, J=9Hz), 4.31 (2H, d, J=8Hz), 4.80(2H, s), 5.27(2H, s), 6.88(2H, d, J=9Hz), 7.20-7.60(7H, m). 
     As an isomer, 0.51 g of 2-4-(2,2,2-trifluoroethoxy)benzylimino)-3-(2,2,2-trifluoroethyl)-5-phenyltetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Melting point: 103.0-104.5° C. 
     IR ν KBr   max  (cm -1 ) 1675, 1605, 1500, 1430, 1375, 1350, 1285, 1260, 1230, 1190, 1160, 1150, 1135, 1100, 1060, 1035, 965. 
       1  H NMR δCDCl 3  /TMS (ppm): 4.32(2H, q, J=8Hz), 4.47 (2H, s), 4.87(2H, s), 5.13(2H, d, J=10Hz), 6.94(2H, d, J=8Hz), 7.20-7.60(7H, m). 
     EXAMPLE 15 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-[4-(1,1,2,2-tetrafluoroethoxy)benzyl]-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 171) 
     A solution of 0.65 g of trichloromethyl chloroformate in 20 ml of benzene was added dropwise to a solution of 0.76 9 of 1,3,5-tris(p-tolyl)hexahydro-s-triazine in 1ml of tetrahydrofuran at room temperature with stirring under a nitro9en current. rThe reaction solution was stirred at room temperature for 1 hour and then 2.20 9 of 1-4-(1,1,2,2-tetrafluoroethoxy)benzy]-3-(2,2,2-trifluoroethyllthiourea was added at room temperature with stirring, and then 4 ml of triethylamine was added. The mixture was stirred at room temperature for 6 hours. Water (50 ml) was added to the reaction mixture, and the mixture was extracted with 200 ml of ethyl acetate. The ethyl acetate solution was washed with water and dried, and ethyl acetate was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (10:1)) to give 0.23 g of the captioned compound. 
     Refractive index n 20   D  : 1.5242. 
     IR ν neat   max  (cm -1 ) 1680, 1615, 1510, 1450, 1390, 1360, 1285, 1270, 1265, 1210, 1190, 1145, 1130. 
       1  H NMR δCDCl 3  /TMS (ppm): 2.37(3H, s), 3.80(2H, q, J=9Hz), 4.80(2H, s), 5.28(2H, s), 5.89(lH, tm, J=52Hz), 7.0-7.4(6H, m), 7.30(2H, d, J=8Hz). 
     As an isomer, 0.32 g of 2-4-(1,1,2,2-tetrafluoroethoxy)benzylimino]-3-(2,2,2-trifluoroethyl)-5-(4-methylphenyl)tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Melting point: 89.0-90.5° C. 
     IR ν KBr   max  (cm -1 ) 1690, 1620, 1515, 1505, 1440, 1425, 1410, 1395, 1300, 1265, 1260, 1205, 1180, 1160, 1110. 
       1  H NMR δCDCl 3  /TMS (ppm): 2.40(3H, s), 4.52(2H, s), 4.86(2H, s), 5.15(2H, q, J=10Hz), 5.93(lH, tm, J=52Hz), 7.10-7.50(8H, m). 
     EXAMPLE 16 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-pentafluoroethylbenzyl)-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 193) 
     0.71 g of N-chloromethyl-N-(4-methylphenyl)carbamoyl chloride and 1.20 g of 1-(4-pentafluoroethylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 30 ml of toluene, and the solution was heated under reflux for 4 hours. After the reaction, toluene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (10:1)]to give 0.72 g of the captioned compound. 
     Refractive index n 20   D  : 1.505 
     IR ν neat   max  (cm -1 ) 3030, 2930, 1680, 1610, 1515, 1450, 1390, 1290, 1260, 1200, 1140, 1105, 1095, 1045, 975, 940, 890, 845, 815, 750, 720. 
       l  H NMR δCDCl 3  /TMS (ppm): 2.32(3H, s), 3.74(2H, q, J=8Hz), 4.74(2H, s), 5.24(2H, s), 7.17(4H, s), 7.28(2H, d, J AB=  2Hz), 7.38(2H, d, J AB  =2Hz). 
     As an isomer, 0.16 g of 2-(4-pentafluoroethylbenzylimino)-3-(2,2,2-trifluoroethyl)-5-(4-methylphenyl)tetrahydro-1,3,5-thiadiazin-4-one was obtained. Melting point: 102.9-103.6° C. 
     IRν KBr   max  (cm -1 ) 3030, 2980, 2800, 1700, 1625, 1510, 1450, 1395, 1335, 1290, 1260, 1210, 1170, 1120, 1050, 970, 950, 815, 750, 730. 
       1  H NMR δCDCl 3  /TMS (ppm): 2.36(3H, s), 4.54(2H, s), 4.82(2H, s), 5.06(2H, q, J=8Hz), 7.18(4H, s), 7.44(2H, d, J AB  =8Hz). 
     EXAMPLE 17 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-2-[4-(2-chloro-2-propeneoxy)benzyl-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 180) 
     0.65 g of N-chloromethyl-N-(4-methylphenyl)carbamoyl chloride and 1.0 g of 1-4-(2-chloro-2-propeneoxy)benzyl-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 30 ml of toluene, and the solution was heated under reflux for 3 hours. After the reaction, toluene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography [silica gel; developing solvent hexane/ethyl acetate (10:1)) to give 0.82 g of the captioned compound. 
     Refractive index n 20   D  1.5641. 
     IR ν neat   max  (cm -1 ) 1680, 1610, 1510, 1450, 1390, 1360, 1290, 1265, 1240, 1210, 1170, 1140, 1090, 1045, 940, 890, 845, 820, 760, 745, 720. 
       1  H NMR δCDCl 3  /TMS (ppm) 2.32(3H, s), 3.77(2H, q, J=10Hz), 4.52(2H, s), 4.72(2H, s), 5.20(2H, s), 5.40(lH, s), 5.54(lH, s), 6.86(2H, d, J AB  =9Hz), 7.10(4H, s), 7.48(2H, d, J AB  =9Hz). 
     As an isomer, 0.14 g of 2-[4-(2-chloro-2-propeneoxy)benzylimino)-3-(2,2,2-trifluoroethyl)-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one was obtained as a semisolid. 
     IRν neat   max  (cm -1 ): 1690, 1615, 1510, 1440, 1390, 1300, 1260, 1220, 1160, 1115, 1160, 1115, 1045, 890, 820, 765, 720. 
       1  H NMR δCDCl 3  /TMS (ppm): 2.36(3H, s), 4.46(2H, s), 4.60(2H, s), 4.80(2H, s), 5.07(2H, q, J=10Hz), 5.42(lH, s), 5.57(lH, s), 6.94(2H, d, J AB  =10Hz), 7.22(4H, s), 7.26(2H, d, 
     EXAMPLE 18 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-t-butoxycarbonylbenzyl)-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 215) 
     0.31 g of N-chloromethyl-N-(4-methylphenyl)carbamoyl chloride and 0.49 g of 1-(4-t-butoxycarbonylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 30 ml of benzene, and the solution was heated under reflux for 5 hours. After the reaction, benzene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography [silica gel; developing solvent hexane/ethyl acetate (9:1)) to obtain 0.34 g of the captioned compound. 
     Refractive index n 20   D  1.5329. 
     IR ν neat   max  (cm -1 ) 1700, 1670, 1605, 1505, 1440, 1380, 1360, 1305, 1290, 1260, 1200, 1160, 1140, 1110, 1085, 1040, 1010, 990, 930, 840, 810. 
       l  H NMR δCDCl 3  /TMS (ppm): 1.57(9H, s), 2.35(3H, s), 3.77(2H, q, J=10Hz), 4.80(2H, s), 5.27(2H, s), 7.21(4H, s), 7.48(2H, d, J AB  =8Hz), 7.94(2H, 
     As an isomer, 0.10 g of 2-(4-t-butoxycarbonylbenzylimino)-3-(2,2,2-trifluoroethyl)-5-(4-methylphenyl)tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Melting point: 105.0-108.0° C. 
     IR ν KBr   max  (cm -1 ) 1690, 1610, 1505, 1440, 1390, 1360, 1290, 1265, 1200, 1155, 1110, 1070, 1040, 1010, 980, 965, 840, 830, 810, 745. 
       l  H NMR δCDCl 3  /TMS (ppm): 1.60(9H, s), 2.37(3H, s), 4.56(2H, s), 4.84(2H, s), 5.09(2H, q, J=l0Hz), 7.24(4H, s), 7.43(2H, d, J AB  =9Hz), 8.04(2H, d, J AB  =9Hz). 
     EXAMPLE 19 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-(4-trifluoromethoxybenzyl)-5-(2-fluoro-4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 237) 
     0.60 g of N-chloromethyl-N-(2-fluoro-4-methylphenyl)carbamoyl chloride and 0.84 g of 1-(4-trifluoromethoxybenzyl)-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 50 ml of toluene, and the solution was heated under reflux for 5 hours. After the reaction, toluene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (9:1)) to give 0.68 g of the captioned compound. 
     Refractive index n 20   D  : 1.5180. 
     IR ν neat   max  (cm -1 ) 1685, 1615, 1510, 1450, 1390, 1360, 1260, 1220, 1140, 1100, 1080, 1040, 1015, 935, 840, 810, 745. 
       l  H NMR δCDCl 3  /TMS (ppm): 2.36(3H, s), 3.76(2H, q, J=9.6Hz), 4.70(2H, s), 5.20(2H, s), 6.92-7.24 (5H, m), 7.43(2H, d, J=9Hz). 
     As an isomer, 0.17 g of 2-(4-trifluoromethoxybenzylimino)-3-(2,2,2-trifluoroethyl)-5-(2-fluoro-4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one was obtained as a semisolid. 
     IR ν neat   max  (cm -1 ) 1710, 1615, 1590, 1510, 1445, 1390, 1360, 1330, 1270, 1250, 1220, 1150, 1105, 1035, 830, 815, 755. 
       l  H NMR δCDCl 3  /TMS (ppm): 2.38(3H, s), 4.52(2H, s), 4.76(2H, s), 5.08(2H, d, J=9Hz), 6.91-7.37 (7H, m). 
     EXAMPLE 20 
     Synthesis of 2-(2,2,2-trifluoroethylimino)-3-fluoro-4-(2,2,2-trifluoroethoxy)benzyl]-5-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one (compound No. 281) 
     0.6 g of N-chloromethyl-N-(4-methylphenyl)carbamoyl chloride and 1.00 g of 1-[3-fluoro-4-(trifluoroethoxy)benzyl-3-(2,2,2-trifluoroethyl)thiourea were dissolved in 50 ml of toluene, and the solution was heated under reflux for 3 hours. After the reaction, toluene was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (4:1)]to give 0.63 g of the captioned compound. 
     Melting point: 94.1-95.6° C. 
     IR ν KBr   max  (cm -1 ) 1665, 1605, 1515, 1465, 1440, 1425, 1410, 1315, 1290, 1265, 1170, 1145, 1125, 965, 935, 830, 765, 755. 
       l  H NMR δCDCl 3  /TMS (ppm): 2.36(3H, s), 3.81(2H, q, J=9Hz), 4.37(2H, q, J=8Hz), 4.80(2H, s), 5.16(2H, s), 6.90-7.40(7H, m). 
     As an isomer, 0.04 g of 2-3-fluoro-4-(2,2,2-trifluoroethoxy)benzylimino-3-(2,2,2-trifluoroethyl)-(4-methylphenyl)-tetrahydro-1,3,5-thiadiazin-4-one was obtained. 
     Refractive index n 20   D  : 1.5196. 
     IR ν KBr   max  (cm -1 ): 1690, 1620, 1515, 1445, 1395, 1290, 1265, 1215, 1165, 1115, 1055, 975, 865, 820, 775. 
       1  H NMRδCDCl 3  /TMS (ppm): 2.35(3H, s), 4.39(2H, q, J=8Hz), 4.44(2H, s), 4.82(2H, s), 5.06 (2H, q, J=9Hz), 7.00-7.30(7H, m). 
     Table 2 below shows the  1  H NMR data, IR data and properties of compounds produced by methods substantially in accordance with the methods described in Examples 1 to 20. 
     
                                           TABLE 2                                 
__________________________________________________________________________
Com-                                Melting point                         
pound                               or refractive                         
No. .sup.1 H NMRδ.sub.TMS.sup.CDCl.sub.3 (ppm)                      
                      IRν.sub.max (cm.sup.-1)                          
                                    index                                 
__________________________________________________________________________
1   2.28 (3H, s), 3.67 (2H, q, J=9Hz),                                    
                      1680, 1610, 1500, 1450, 1390,                       
                                    Semisolid                             
    4.65 (2H, s), 5.18 (2H, s),                                           
                      1360, 1270, 1205, 1140, 1090,                       
    6.90-7.26 (9H, m) 1040, 935, 845, 755, 715, 690                       
    &lt;CDCl.sub.3 &gt;     &lt;neat&gt;                                              
2   1.23 (3H, t, J=7Hz), 2.65 (2H, q,                                     
                      1685, 1610, 1500, 1445, 1390,                       
                                    Refractive                            
    J=7Hz), 3.83 (2H, q, J=8Hz), 4.80                                     
                      1345, 1265, 1150, 1090, 1035,                       
                                    index                                 
    (2H, s), 5.30 (2H, s), 6.70-7.50                                      
                      970, 940, 845, 825, 775, 755                        
                                    n.sub.D.sup.20  1.5726                
    (9H, m)           &lt;neat&gt;                                              
    &lt;CDCl.sub.3 &gt;                                                         
3   1.24 (6H, d, J=8Hz), 2.68-3.07                                        
                      1680, 1610, 1490, 1440, 1390,                       
                                    Semisolid                             
    (1H, m), 3.76 (2H, q, J=9Hz), 4.80                                    
                      1270, 1260, 1200, 1140, 1090,                       
    (2H, s), 5.32 (2H, s), 7.12-7.44                                      
                      1055, 1040, 940, 890, 845,                          
    (9H, m)           760                                                 
    &lt;CDCl.sub.3 &gt;     &lt;neat&gt;                                              
4   0.80-1.00 (3H, m), 1.10-1.70                                          
                      1680, 1610, 1495, 1440, 1380,                       
                                    Refractive                            
    (4H, m), 2.58 (2H, t, J=7Hz), 3.76                                    
                      1340, 1260, 1200, 1140, 1090,                       
                                    index                                 
    (2H, q, J=8Hz), 4.80 (2H, s), 5.30                                    
                      1035, 935, 840, 750                                 
                                    n.sub.D.sup.20  1.5501                
    (2H, s), 6.60-7.40 (9H, m)                                            
                      &lt;neat&gt;                                              
    &lt;CDCl.sub.3 &gt;                                                         
5   0.80 (3H, t, J=6Hz), 1.12-1.24                                        
                      1680, 1625, 1550, 1500, 1450,                       
                                    Semisolid                             
    (3H, m), 1.42-1.68 (2H, m),                                           
                      1390, 1280, 1265, 1200, 1140,                       
    2.34-2.62 (1H, m), 3.75 (2H, q,                                       
                      1090, 1040, 935, 845, 755                           
    J=9Hz), 4.75 (2H, s), 5.16 (2H, s),                                   
                      &lt;neat&gt;                                              
    6.94-7.25 (9H, m)                                                     
    &lt;CDCl.sub.3 &gt;                                                         
7   2.30 (3H, s), 2.37 (3H, s), 3.80                                      
                      1690, 1610, 1510, 1445, 1390,                       
                                    Semisolid                             
    (2H, q, J=8Hz), 4.77 (2H, s), 5.32                                    
                      1290, 1265, 1205, 1140, 1090,                       
    (2H, s), 7.00-7.50 (8H, m)                                            
                      1040, 1020, 940, 740, 705                           
    &lt;CDCl.sub.3 &gt;     &lt;neat&gt;                                              
9   1.20 (3H, s), 1.33 (3H, s), 2.40                                      
                      1670, 1610, 1510, 1455, 1395,                       
                                    Melting point                         
    (3H, s), 2.87 (1H, d, q, J=7Hz,                                       
                      1365, 1280, 1265, 1210, 1145,                       
                                    84.5-86.0° C.                  
    J=5Hz), 3.87 (2H, q, J=8Hz), 4.86                                     
                      1125, 1085, 1040, 940, 880,                         
    (2H, s), 5.33 (2H, s), 7.20 (2H, d,                                   
                      845, 820, 755, 720                                  
    J=6Hz), 7.23 (4H, s), 7.50 (2H, d,                                    
                      &lt;KBr&gt;                                               
    J=6Hz)                                                                
    &lt;CDCl.sub.3 &gt;                                                         
18  1.32 (9H, s), 3.80 (2H, q, J=9Hz),                                    
                      1680, 1610, 1515, 1500, 1460,                       
                                    Refractive                            
    4.73 (2H, s), 5.27 (2H, s), 7.00-7.50                                 
                      1440, 1400, 1385, 1360, 1270,                       
                                    index                                 
    (8H, m)           1260, 1255, 1235, 1130, 1090,                       
                                    n.sub.D.sup.20  1.5455                
    &lt;CDCl.sub.3 &gt;     1040, 1020, 940                                     
                      &lt;neat&gt;                                              
21  1.26 (9H, s), 2.33 (3H, s), 3.76 (2H,                                 
                      1890, 1620, 1520, 1450, 1400,                       
                                    Melting point                         
    q, J=9Hz), 4.64 (2H, s), 5.22                                         
                      1370, 1290, 1275, 1210, 1150,                       
                                    114-116° C.                    
    (2H, s), 6.88-7.43 (7H, m)                                            
                      1090, 940, 850, 820, 760, 730                       
    &lt;CDCl.sub.3 &gt;     710                                                 
                      &lt;KBr&gt;                                               
26  1.35 (3H, t, J=8Hz), 2.30 (3H, s),                                    
                      1680, 1610, 1515, 1445, 1390,                       
                                    Refractive                            
    3.74 (2H, q, J=8Hz), 3.93 (2H, q,                                     
                      1290, 1270, 1245, 1205, 1175,                       
                                    index                                 
    J=8Hz), 4.62 (2H, s), 4.14 (2H, s),                                   
                      1140, 1085, 1045, 935, 845,                         
                                    n.sub.D.sup.20  1.5535                
    6.72 (2H, d, J=8Hz), 7.10 (4H, s),                                    
                      815, 740                                            
    7.29 (2H, d, J=8Hz)                                                   
                      &lt;neat&gt;                                              
    &lt;CDCl.sub.3 &gt;                                                         
28  0.84-0.99 (3H, m), 1.25-1.50 (4H, m),                                 
                      1670, 1610, 1460, 1440, 1400,                       
                                    Refractive                            
    1.60-1.88 (2H, m), 2.36 (3H, s), 3.74                                 
                      1320, 1270, 1150, 1100, 1060,                       
                                    index                                 
    (2H, t, J=9Hz), 3.87 (2H, q, 7=9Hz),                                  
                      1010, 970, 885, 825, 810, 760                       
                                    n.sub.D.sup.20  1.5397                
    4.72 (2H, s), 5.24 (2H, s), 6.80 (2H,                                 
                      &lt;neat&gt;                                              
    d, J=8Hz), 7.18 (4H, s), 7.43 (2H,                                    
    d, J=8Hz)                                                             
    &lt;CDCl.sub.3 &gt;                                                         
29  3.41 (2H, q, J=9Hz), 4.74 (2H, s),                                    
                      1685, 1620, 1505, 1495, 1450,                       
                                    Refractive                            
    5.20 (2H, s), 7.00-7.50 (9H, m)                                       
                      1390, 1365, 1290, 1280, 1270,                       
                                    index                                 
    &lt;CDCl.sub.3 &gt;     1210, 1150, 1095                                    
                                    N.sub.D.sup.20  1.5737                
                      &lt;neat&gt;                                              
30  3.73 (2H, q, J=9Hz), 4.77 (2H, s),                                    
                      1680, 1615, 1500, 1490, 1450,                       
                                    Refractive                            
    5.14 (2H, s), 7.00-7.50 (9H, m)                                       
                      1390, 1275, 1210, 1150, 1130,                       
                                    index                                 
    &lt;CDCl.sub.3 &gt;     1110, 1090, 1070, 1045, 1015,                       
                                    N.sub.D.sup.20  1.5732                
                      940                                                 
                      &lt;neat&gt;                                              
31  2.38 (3H, s), 3.77 (2H, q, J=9Hz),                                    
                      1680, 1610, 1510, 1490, 1450,                       
                                    Semisolid                             
    4.75 (2H, s), 5.24 (2H, s),                                           
                      1380, 1350, 1270, 1260, 1210,                       
    7.14-7.46 (8H, m) 1160, 1090, 1040, 1015, 935,                        
    &lt;CDCl.sub.3 &gt;     890, 850, 820, 800                                  
                      &lt;neat&gt;                                              
36  2.34 (3H, s), 3.74 (2H, q, J=10Hz),                                   
                      1690, 1675, 1650, 1615, 1520,                       
                                    Melting point                         
    4.76 (2H, s), 5.11 (2H, s),                                           
                      1475, 1400, 1270, 1150, 1125,                       
                                    108.6-110.1° C.                
    7.12-7.50 (7H, m) 1095, 1035, 935, 825, 760,                          
    &lt;CDCl.sub.3 &gt;     740, 690, 670                                       
                      &lt; KBr&gt;                                              
44  3.78 (2H, q, J=9Hz), 4.80 (2H, s),                                    
                      1680, 1610, 1505, 1445, 1390,                       
                                    Semisolid                             
    5.23 (2H, s), 6.79-7.56 (12H, m)                                      
                      1260, 1140, 1095, 1040, 935,                        
    &lt;CDCl.sub.3 &gt;     840, 690                                            
                      &lt;neat&gt;                                              
47  3.88 (2H, q, J=9Hz), 4.89 (2H, s),                                    
                      1675, 1610, 1505, 1450, 1385,                       
                                    Refractive                            
    5.11 (2H, s), 5.31 (2H, s), 6.98                                      
                      1270, 1260, 1140, 1090, 1040,                       
                                    index                                 
    (2H, d, J=9Hz), 7.10-7.60 (12H, m)                                    
                      1025          n.sub.D.sup.20  1.5892                
    &lt;CDCl.sub.3 &gt;     &lt;neat&gt;                                              
48  2.36 (3H, s), 3.89 (2H, q, J=9Hz),                                    
                      1680, 1610, 1515, 1455, 1390,                       
                                    Refractive                            
    4.72 (2H, s), 5.04 (2H, s), 5.27                                      
                      1270, 1145, 1090, 940, 820,                         
                                    index                                 
    (2H, s), 6.80-7.56 (13H, m)                                           
                      750, 695      n.sub.D.sup.20  1.5720                
    &lt;CDCl.sub.3 &gt;     &lt;neat&gt;                                              
70  3.85 (2H, q, J=9Hz), 4.84 (2H, s),                                    
                      1680, 1615, 1510, 1450, 1390,                       
                                    Refractive                            
    5.31 (2H, s), 6.54 (1H, t, J=74Hz),                                   
                      1260, 1130, 1090, 1040, 930,                        
                                    index                                 
    7.05-7.61 (9H, m) 840           n.sub.D.sup.20  1.5361                
                      &lt;neat&gt;                                              
73  3.81 (2H, q, J=9Hz), 4.85 (2H, s),                                    
                      1685, 1620, 1500, 1450, 1390,                       
    5.31 (2H, s), 7.03-7.65 (9H, m)                                       
                      1275, 1215, 1150, 1050, 870,                        
                      760, 695                                            
                      &lt;neat&gt;                                              
76  3.85 (2H, q, J=9Hz), 4.86 (2H, s),                                    
                      1670, 1610, 1500, 1490, 1440,                       
                                    Refractive                            
    5.35 (2H, s), 5.98 (1H, tm, J=52Hz),                                  
                      1380, 1280, 1265, 1255, 1250,                       
                                    index                                 
    7.10-7.80 (9H, m) 1235, 1220, 1090, 1080                              
                                    n.sub.D.sup.20  1.5160                
                      &lt;neat&gt;                                              
77  3.81 (2H, q, J=9.2Hz), 4.31 (2H, tm,                                  
                      1680, 1610, 1510, 1490, 1450,                       
                                    Refractive                            
    8.3Hz), 4.83 (2H, s), 5.23 (2H, s),                                   
                      1425, 1390, 1360, 1290, 1255,                       
                                    index                                 
    6.01 (2H, tt, J=53.1, 5.4Hz),                                         
                      1205, 1175, 1090, 1070, 1040,                       
                                    n.sub.D.sup.20  1.5300                
    6.80-7.50 (9H, m) 940, 845, 830                                       
                      &lt;neat&gt;                                              
81  3.82 (2H, q, J=8Hz), 4.66 (2H, s),                                    
                      1700, 1680, 1610, 1490, 1445,                       
                                    Refractive                            
    4.83 (2H, s), 5.30 (2H, s), 7.10-7.60                                 
                      1405, 1380, 1360, 1290, 1275,                       
                                    index                                 
    (9H, m)           1260, 1255, 1220, 1205, 1170,                       
                                    n.sub.D.sup.20  1.5296                
                      1085, 1010, 995, 965, 935,                          
                      840, 825                                            
                      &lt;neat&gt;                                              
82  3.80 (2H, q, J=9Hz), 4.85 (2H, s),                                    
                      1680, 1610, 1500, 1445, 1390,                       
                                    Refractive                            
    5.25 (2H, s), 6.80-7.60 (9H, m)                                       
                      1360, 1285, 1270, 1205, 1170,                       
                                    index                                 
                      1140, 1090, 970, 845                                
                                    n.sub.D.sup.20  1.5744                
                      &lt;neat&gt;                                              
85  3.84 (2H, q, J=8Hz), 4.58 (2H, s),                                    
                      1670, 1605, 1505, 1485, 1440,                       
                                    Refractive                            
    4.78 (2H, s), 5.24 (2H, s), 5.43                                      
                      1385, 1350, 1280, 1260, 1215,                       
                                    index                                 
    (1H, s), 5.55 (1H, s), 6.84 (2H, d,                                   
                      1140, 1080, 1040, 1010, 930,                        
                                    n.sub.D.sup.20  1.5738                
    J.sub.AB =9Hz), 7.10-7.50 (7H, m)                                     
                      885, 825, 755, 720                                  
                      &lt;neat&gt;                                              
90  3.79 (2H, q, J=9Hz), 4.85 (2H, s),                                    
                      1680, 1615, 1500, 1425, 1390,                       
                                    Melting point                         
    5.26 (2H, s), 6.76 (1H, t, J=57Hz),                                   
                      1260, 1205, 1125, 1065, 940,                        
                                    70-75° C.                      
    7.20-7.52 (9H, m) 840, 750, 690                                       
                      &lt;neat&gt;                                              
92  3.81 (2H, q, J=9Hz), 4.86 (2H, s),                                    
                      1680, 1615, 1500, 1385, 1260,                       
                                    Refractive                            
    5.32 (2H, s), 7.15-7.72 (9H, m)                                       
                      1140, 1060, 930, 835                                
                                    index                                 
                      &lt;neat&gt;        n.sub.D.sup.20  1.5774                
93  3.78 (2H, q, J=9Hz), 4.83 (2H, s),                                    
                      1685, 1620, 1505, 1450, 1395,                       
                                    Refractive                            
    5.29 (2H, s), 7.16-7.69 (9H, m)                                       
                      1270, 1150, 1095, 890, 695                          
                                    index                                 
                      &lt;neat&gt;        n.sub.D.sup.20  1.5650                
98  3.74 (2H, q, J=8Hz), 4.74 (2H, s),                                    
                      2940, 1690, 1620, 1495, 1450,                       
                                    Refractive                            
    5.22 (2H, s), 7.16 (2H, d, J.sub.AB =8Hz),                            
                      1390, 1290, 1260, 1210, 1145,                       
                                    index                                 
    7.32 (2H, d, J.sub.AB =8Hz), 7.48 (5H, s)                             
                      1095, 1020, 980, 940, 830,                          
                                    n.sub.D.sup.20  1.5269                
                      750, 730                                            
                      &lt;neat&gt;                                              
99  3.77 (2H, q, J=9Hz), 5.33 (2H, s),                                    
                      1500, 1450, 1405, 1390, 1350,                       
                                    Refractive                            
    4.90 (2H, s), 7.20-7.70 (9H, m)                                       
                      1270, 1260, 1230, 1210, 1180,                       
                                    index                                 
                      1145, 1115, 1095, 1065, 1040,                       
                                    n.sub.D.sup.20  1.4962                
                      1020, 930, 900                                      
                      &lt;neat&gt;                                              
101 3.80 (2H, q, J=9Hz), 4.87 (2H, s),                                    
                      1680, 1610, 1500, 1490, 1445,                       
                                    Refractive                            
    5.31 (2H, s), 7.30-7.80 (9H, m)                                       
                      1390, 1360, 1280, 1200, 1140,                       
                                    index                                 
                      1105, 1090    n.sub.D.sup.20  1.4814                
                      &lt;neat&gt;                                              
102 3.51 (2H, s), 3.78 (2H, q, J=9.2Hz),                                  
                      1685, 1620, 1500, 1450, 1390,                       
                                    Refractive                            
    4.78 (2H, s), 5.26 (2H, s), 7.10-7.60                                 
                      1365, 1335, 1280, 1270, 1260,                       
                                    index                                 
    (9H, m)           1220, 1175, 1150, 1120, 1095,                       
                                    n.sub.D.sup.20  1.4857                
                      1050, 980                                           
                      &lt;neat&gt;                                              
104 3.79 (2H, q, J=9Hz), 4.82 (2H, s),                                    
                      1680, 1620, 1495, 1440, 1390,                       
                                    Semisolid                             
    4.26 (2H, s), 6.79 (1H, s), 7.10-7.70                                 
                      1290, 1265, 1210, 1160, 1140,                       
    (9H, m)           1080                                                
                      &lt;KBr&gt;                                               
120 1.59 (9H, s), 3.77 (3H, q, J=9Hz),                                    
                      1700, 1680, 1610, 1495, 1440,                       
                                    Refractive                            
    4.84 (2H, s), 5.35 (2H, s), 7.10-7.60                                 
                      1385, 1365, 1305, 1290, 1270,                       
                                    index                                 
    (7H, m), 7.92 (2H, d, J=8Hz)                                          
                      1260, 1250, 1205, 1160, 1140,                       
                                    n.sub.D.sup.20  1.5650                
                      1115, 1090                                          
                      &lt;neat&gt;                                              
125 3.83 (2H, q, J= 9Hz), 4.86 (2H, s),                                   
                      1700, 1620, 1510, 1465, 1300,                       
                                    Refractive                            
    5.37 (2H, s), 7.00-7.80 (9H, m), 8.01                                 
                      1330, 1310, 1265, 1195, 1165,                       
                                    index                                 
    (1H, m), 8.31 (1H, m)                                                 
                      1120, 1095, 1070, 835                               
                                    n.sub.D.sup.20  1.5646                
                      &lt;neat&gt;                                              
166 2.36 (3H, s), 3.76 (2H, q, J=9Hz),                                    
                      1680, 1615, 1510, 1440, 1390,                       
                                    Refractive                            
    4.78 (2H, s), 5.28 (2H, s), 7.08-7.56                                 
                      1260, 1140, 1080, 1015, 935,                        
                                    index                                 
    (8H, m)           840, 815      n.sub.D.sup.20  1.5227                
                      &lt;neat&gt;                                              
170 2.39 (3H, s), 3.84 (2H, q, J=9Hz),                                    
                      1670, 1600, 1510, 1400, 1380,                       
                                    Melting point                         
    4.35 (2H, q, J=8Hz), 4.83 (2H, s),                                    
                      1280, 1260, 1230, 1200, 1170,                       
                                    130.0-131.0° C.                
    5.31 (2H, s), 6.91 (2H, d, J=8Hz),                                    
                      1140, 1120, 1105, 1070                              
    7.10-7.40 (4H, m), 7.54 (2H, d,                                       
                      &lt;neat&gt;                                              
    J=8Hz)                                                                
172 2.38 (3H, s), 3.83 (2H, q, J=9Hz),                                    
                      1685, 1620, 1515, 1450, 1390,                       
                                    Refractive                            
    4.33 (2H, tm, J=11Hz), 4.79 (2H, s),                                  
                      1365, 1290, 1275, 1265, 1260,                       
                                    index                                 
    5.23 (2H, s), 6.12 (2H, tt, J=54Hz,                                   
                      1210, 1080, 1050, 1015, 1095,                       
                                    n.sub.D.sup.20  1.5279                
    8Hz), 6.80-7.70 (8H, m)                                               
                      940, 835                                            
                      &lt;neat&gt;                                              
177 2.36 (3H, s), 3.81 (2H, q, J=9.1Hz),                                  
                      1680, 1610, 1585, 1515, 1495,                       
                                    Refractive                            
    4.81 (2H, s), 5.24 (2H, s), 6.94 (2H,                                 
                      1450, 1390, 1360, 1290, 1275,                       
                                    index                                 
    d, J=8.9Hz), 7.17 (2H, d, J=8.6Hz),                                   
                      1260, 1240, 1220, 1205, 1170,                       
                                    n.sub.D.sup.20  1.5627                
    7.21 (2H, d, J=8.6Hz), 7.50 (2H, d,                                   
                      1150, 1110, 1090, 1045, 1020,                       
    J=8.9Hz)          940, 845, 820                                       
                      &lt;neat&gt;                                              
181 2.36 (1H, s), 3.83 (2H, q, J=10Hz),                                   
                      1690, 1615, 1520, 1450, 1395,                       
                                    Refractive                            
    4.65 (2H, d, J=1Hz), 4.81 (2H, s),                                    
                      1365, 1290, 1270, 1220, 1140,                       
                                    index                                 
    5.25 (2H, s), 5.65-5.70 (1H, m),                                      
                      1090, 1045, 940, 900, 850,                          
                                    n.sub.D.sup.20  1.5650                
    6.00-6.03 (1H, m), 6.85 (2H, d,                                       
                      825, 750, 670                                       
    J.sub.AB =9Hz), 7.22 (4H, s), 7.45 (2H, d,                            
                      &lt;neat&gt;                                              
    J.sub.AB =9Hz)                                                        
182 2.35 (3H, s), 3.80 (2H, q, J=8.9Hz),                                  
                      1680, 1610, 1510, 1450, 1390,                       
                                    Refractive                            
    4.62 (2H, d, J=1.5Hz), 4.78 (2H, s),                                  
                      1360, 1290, 1270, 1240, 1210,                       
                                    index                                 
    5.21 (2H, s), 6.56 (1H, t, J=1.5Hz),                                  
                      1175, 1145, 1090, 1030, 930,                        
                                    n.sub.D.sup.20  1.5644                
    6.82 (2H, d, J.sub.AB =8.4Hz), 7.15-7.22                              
                      820                                                 
    (4H, m), 7.42 (2H, d, J.sub.AB =8.4Hz)                                
                      &lt;neat&gt;                                              
183 2.35 (3H, s), 3.80 (2H, q, J=8.9Hz),                                  
                      1670, 1600, 1495, 1430, 1375,                       
                                    Melting point                         
    4.77 (2H, s), 4.81 (2H, s), 5.22                                      
                      1275, 1250, 1195, 1160, 1130,                       
                                    86.7-87.7° C.                  
    (2H, s), 6.39 (1H, s), 6.86 (2H, d,                                   
                      1070, 1020, 920, 800                                
    J.sub.AB =8.9Hz), 7.15-7.21 (4H, m), 7.42                             
                      &lt;neat&gt;                                              
    (2H, d, J.sub.AB =8.9Hz)                                              
185 2.44 (3H, s), 3.91 (3H, q, J=9Hz),                                    
                      1680, 1610, 1510, 1490, 1445,                       
                                    Melting point                         
    4.98 (2H, s), 5.43 (2H, s), 7.01                                      
                      1385, 1260, 1205, 1140, 1060,                       
                                    85.0-88.0° C.                  
    (1H, t, J=59Hz), 7.43 (4H, s), 7.74                                   
                      935, 890, 840, 815, 750                             
    (4H, s)           &lt;neat&gt;                                              
186 2.38 (3H, s), 3.81 (2H, q, J=9Hz),                                    
                      1680, 1620, 1510, 1490, 1445,                       
                                    Refractive                            
    4.83 (2H, s), 5.33 (2H, s), 7.24                                      
                      1390, 1260, 1210, 1085, 1045,                       
                                    index                                 
    (4H, s), 7.50-7.70 (4H, m)                                            
                      1015, 935, 845, 815, 750                            
                                    n.sub.D.sup.20  1.5406                
                      &lt;neat&gt;                                              
187 2.35 (3H, s), 3.76 (2H, q, J=9Hz),                                    
                      1695, 1620, 1515, 1450, 1390,                       
                                    Melting point                         
    4.81 (2H, s), 5.24 (2H, s), 7.18                                      
                      1275, 1260, 1155, 1040, 935,                        
                                    74.0-76.0° C.                  
    (4H, s), 7.40-7.63 (4H, m)                                            
                      840, 740                                            
                      &lt;KBr&gt;                                               
194 2.36 (3H, s), 3.79 (2H, q, J=9.2Hz),                                  
                      1685, 1620, 1515, 1450, 1395,                       
                                    Refractive                            
    4.85 (2H, s), 5.30 (2H, s), 7.18 (2H,                                 
                      1350, 1290, 1275, 1230, 1210,                       
                                    index                                 
    d, J=8.4Hz), 7.22 (2H, d, J=8.4Hz),                                   
                      1180, 1150, 1120                                    
                                    n.sub.D.sup.20  1.4992                
    7.50 (2H, d, J=8.4Hz), 7.57 (2H, d,                                   
                      &lt;neat&gt;                                              
    J=8.4Hz)                                                              
196 2.37 (3H, s), 3.83 (2H, q, J=9Hz),                                    
                      1685, 1620, 1515, 1450, 1395,                       
                                    Refractive                            
    4.86 (2H, s), 5.31 (2H, s), 7.10-7.70                                 
                      1365, 1290, 1275, 1270, 1260,                       
                                    index                                 
    (8H, m)           1240, 1205, 1175, 1150, 1115,                       
                                    n.sub.D.sup.20  1.4757                
                      1095                                                
                       &lt;neat&gt;                                             
220 2.36 (3H, s), 3.83 (2H, q, J=9Hz),                                    
                      1680, 1615, 1510, 1460, 1390,                       
                                    Refractive                            
    4.80 (2H, s), 5.29 (2H, s), 7.12                                      
                      1325, 1285, 1260, 1195, 1165,                       
                                    index                                 
    (2H, d, J.sub.AB =8Hz), 7.10-7.30 (4H, m),                            
                      1130, 1090, 1070, 1020, 940,                        
                                    n.sub.D.sup.20  1.5449                
    7.63 (2H, d, J.sub.AB =8Hz), 8.00 (1H, m),                            
                      915, 845, 820, 750, 730                             
    8.32 (1H, m)      &lt;neat&gt;                                              
221 3.85 (2H, q, J=9Hz), 4.79 (2H, s),                                    
                      1680, 1610, 1505, 1495, 1440,                       
                                    Refractive                            
    5.33 (2H, s), 6.58 (1H, t, J=75Hz),                                   
                      1385, 1280, 1255, 1210, 1120,                       
                                    index                                 
    7.05-7.59 (8H, m) 1075, 1035, 930, 835, 820,                          
                                    n.sub.D.sup.20  1.5209                
                      745                                                 
                      &lt;neat&gt;                                              
245 3.84 (2H, q, J=8Hz), 4.77 (2H, s),                                    
                      1690, 1620, 1510, 1480, 1455,                       
                                    Refractive                            
    5.32 (2H, s), 7.00-7.60 (7H, m)                                       
                      1395, 1275, 1220, 1150, 1015,                       
                                    index                                 
                      940, 845, 790, 710                                  
                                    n.sub.D.sup.20  1.5107                
                      &lt;neat&gt;                                              
258 3.78 (2H, q, J=10Hz), 4.36 (2H, q,                                    
                      1680, 1620, 1595, 1515, 1390,                       
                                    Refractive                            
    J=8Hz), 4.85 (2H, s), 5.17 (2H, s),                                   
                      1290, 1265, 1210, 1160, 1150,                       
                                    index                                 
    6.30-7.50 (8H, m) 1130          n.sub.D.sup.20  1.5335                
                      &lt;neat&gt;                                              
__________________________________________________________________________
 
    
     The following Referential Examples illustrate the production of the starting materials for the compounds provided by this invention. 
     REFERENTIAL EXAMPLE 1 
     Synthesis of 1-(4-t-butylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea 
     (1) 8.16 g of 4-t-butylbenzylamine was added dropwise at -10° C. with stirring to a mixture of 10.32 g of dicyclohexylcarbodiimide (DCC), 20 ml of carbon disulfide and 100 ml of diethyl ether. The temperature of the mixture was returned to room temperature, and it was left to stand for 12 hours. The reaction solution was filtered, and the residue was washed with diethyl ether. The filtrate was combined with the washing, and the solvent was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (19:1) to give 8.41 g of the desired 4-t-butylbenzyl isothiocyanate. 
     Melting point: 44.0-47.0° C. 
     IR ν KBr   max  (cm -1 ) 2940, 2850, 2170, 2100, 1510, 1460, 1410, 1340, 1305, 1280, 1270, 1210, 1200, 1110, 1085, 1020, 805, 710, 540. 
       1  H NMR δCDCl 3  /TMS (ppm): 1.34(9H, s), 4.64(2H, s), 7.22(2H, d, J=8Hz), 7.37(2H, d, J=8Hz). 
     Reference: Angewandte Chemie International Edition, Vol. 6, page 174 (1967). 
     (2) 10.82 g of 4-t-butylbenzoyl isothiocyanate obtawined in (1) and 7.54 g of 2,2,2-trifluoroethylamine were dissolved in 20 ml of ethyl acetawte. The solution was left to stand at room temperature for 24 houirs. Ethyl acetate was evaporated under reduced prerssure. The resultilng oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (4:1)) to give 15.80 g of the desired 1-(4-t-butylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea. 
     Melting point: 101.0-103.0° C. 
     IRν neat   max  (cm -1 ) 3260, 3085, 2950, 1570, 1380, 1350, 1320, 1300, 1290, 1255, 1155, 1125, 1050, 970, 935, 830. 
       l  H NMR δCDCl 3  /TMS (ppm): 1.34(9H, s), 4.30(2 4.5-4.7(2H, m), 5.8-6.2(lH, br), 6.4-6.8(lH, br), 7.23(2H, d, J=9Hz), 7.37(2H, d, J=9Hz). 
     REFERENTIAL EXAMPLE 2 
     Synthesis of 1-(4-trifluoromethylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea 
     (1) 4-Trifluoromethylbenzyl isothiocyanate 
     10 g of 4-trifluoromethylbenzylamine was added dropwise at -10° C. with stirring to a mixture of 11.78 g of DCC, 25 ml of carbon disulfide and 50 ml of diethyl ether. The temperature of the mixture was returned to room temperature, and it was left to stand for 12 hours. The reaction solution was filtered, and the residue was washed with diethyl ether. The filtrate and the washing were combined, and the solvent was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (10:1)]to give 11.15 g of the desired 4-trifluoromethylbenzyl isothiocyanate. 
     Refractive index n 20   D  : 1.5270. 
     IR ν neat   max  (cm -1 ) 2930, 2180, 2090, 1690, 1620, 1420, 1325, 1165, 1125, 1065, 1020, 815. 
       1  H NMR δCDCl 3  /TMS (ppm): 4.74(2H, s), 7.47(2H, d, J=8Hz), 7.66(2H, d, J=8Hz). 
     (2) 1-(4-Trifluoromethylbenzyl)-3-(2,2,2-trifluoro-ethyl)thiourea 
     7.0 g of the 4-trifluoromethylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea obtained in (1) and 3.83 g of 2,2,2-trifluoroethylamine were dissolved in 50 ml of ethyl acetate, and the solution was left to stand at room temperature for 24 hours. Ethyl acetate was evaporated under reduced pressure. The resulting white crystals were recrystallized form hexane to give 8.79 g of the desired 1-(4-trifluoromethylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea. 
     Melting point: 80.0-82.0° C. 
     IR ν KBr   max  (cm -1 ) 3230, 3070, 1615, 1570, 1550, 1390, 1380, 1345, 1320, 1305, 1280, 1245, 1160, 1115, 1105, 1060. 
       1  H NMR δCDCl 3  /TMS (ppm): 4.08-4,40(2H, m), 4.76 (2H, d, J=6Hz), 6.02(lH, m), 6.56(lH, m), 7.38(2H, d, J=8Hz). 7.57(2H, d, J=8Hz). 
     REFERENTIAL EXAMPLE 3 
     Synthesis of 1-(4-trifluoromethoxybenzyl)-3-(2,2,2-trifluoroethyl)thiourea 
     (1) N-(4-trifluoromethoxybenzyl)phthalimide 
     Phosphorus tribromide (5.17 g) was added dropwise to 10.0 g of 4-trifluoromethoxybenzyl alcohol at oC over 10 minutes, and the mixture was stirred at room temperature for 2 hours. The reaction solution was poured into ice water, and extracted with 100 ml of hexane. The hexane solution was washed with water and dried, and hexane was evaporated under reduced pressure to give 13.13 g of white crystals. The crystals were dissolved in 60 ml of dimethylformamide, and 19.26 g of potassium phthalimide and 1 g of potassium iodide were added, and the mixture was heated at 100 oC for 3 hours with stirring. Water (50 ml) was added to the reaction solution, and the mixture was extracted with 200 ml of ethyl acetate. The ethyl acetate solution was washed with water and dried. Ethyl acetate was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (5:1)) to give 14.17 g of the captioned compound. 
     Melting point: 82.1-83.6° C. 
     IR ν KBr   max  (cm -1 ) 1690, 1620, 1515, 1505, 1440, 1425, 1410, 1395, 1300, 1265, 1260, 1205, 1180, 1160, 1110. 
       l  H NMR δCDCl 3  /TMS (ppm): 4.83(2H, s), 7.04-7.85(8H, m). 
     (2) 4-Trifluoromethoxybenzyl isothiocyanate 
     12 g of N-(4-trifluoromethoxybenyl)phthalimide was dissolved in 50 ml of ethanol, and 2.34 g of hydrazine hydrate was added dropwise. Then, the mixture was heated under reflux for 4 hours and then allowed to cool. Concentric hydrochloric acid (10 ml) was added, and the mixture was filtered. The ethanol solution as the filtrate was evaporated under reduced pressure, and the residue was adjusted to pH 11 by adding an aqueous solution of sodium hydroxide. Ethyl acetate (100 ml) was added, and the solution was washed with water and dried. Ethyl acetate was evaporated under reduced pressure to give 6.55 g of an oily product. The resulting oily product (6.55 g) was added dropwise to a mixture of 10.32 g of dicyclohexylcarbodiimide (DCC), 20 ml of carbon disulfide and 100 ml of ethyl ether with stirring at -10° C. The temperature was returned to room temperature, and the mixture was left to stand for 12 hours. 
     The reaction mixture was filtered, and the residue was washed with ethyl ether, and combined with the filtrate. The solvent was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (19:1)) to give 7.53 g of the captioned compound. 
     IR ν neat   max  (cm -1 ) 2080, 1510, 1440, 1340, 1260, 1215, 1160, 1015, 920. 
       l  H NMR δCDCl 3  /TMS (ppm): 4.69(2H, s), 7.28(2H, d, J AB  =9Hz), 7.40(2H, d, J AB  =9Hz). 
     (3) 1-(4-trifluoromethoxybenzyl)-3-(2,2,2-trifluoroethyl)thiourea. 
     6.0 g 4-trifluoromethoxybenzyl isothiocyanate obtained in (2) above and 3.06 g of 2,2,2-trifluoroethylamine were dissolved in 50 ml of ethyl acetate, and the solution was left to stand at room temperature for 24 hours. Ethyl acetate was evaporated under reduced pressure, and the resulting white crystals were recrystallized from hexane to give 6.05 g of the captioned compound. 
     Melting point: 94.7-96.4° C. 
     IR ν neat   max  (cm -1 ) 3240, 3060, 1570, 1510, 1300, 1250, 1180, 1170, 1150, 1110, 975, 920, 825, 
       d1  H NMR δCDCl 3  /TMS (ppm): 4.31(2H, d, J=9Hz), 4.66 (2H, s), 6.30(lH, m), 6.74(lH, m), 7.12-7.55 (9H, m). 
     REFERENTIAL EXAMPLE 4 
     Synthesis of 1-(4-trifluoromethylthiobenzyl)-(2,2,2-trifluoroethyl)thiourea 
     (1) N-(4-trifluoromethylthiobenzyl)phthalimide 
     15.5 g of 4-trifluoromethylthiotoluene and 17.2 g of N-bromosuccinimide were added to 100 ml of benzene, and about 100 mg of 2,2&#39;-azobisisobutyronitrile was added. The mixture was gradually heated. When the temperature reached about 86° C., the reaction solution turned red yellow. It was stirred at the same temperature for 40 minutes. The reaction solution was poured into ice water and extracted with 200 ml of ethyl acetate. The ethyl acetate solution was washed with water and dried. Ethyl acetate was evaporated under reduced pressure to give 21 g of an oily product. This product was dissolved in 50 ml of dimethylformamide, and 14.9 g of potassium phthalimide and 1 g of potassium iodide were added. The mixture was stirred at 60 oC for 1 hour. Water (50 ml) was added to the reaction solution, and the mixture was extracted with 200 ml of toluene. The toluene solution was washed with water and dried, and toluene was evaporated under reduced pressure to give 21.0 g of the captioned compound. 
     Melting point: 130.0-131.5° C. 
     IRν KBr   max  (cm -1 ) 3180, 1765, 1710, 1600, 1465, 1430, 1390, 1340, 1325, 1150, 1120, 1080, 935, 735, 710. 
       l  H NMRδCDCl 3  /TMS (ppm): 4.92(2H, s), 7.40-7.90(8H, m). 
     (2) 4-Trifluoromethylthiobenzyl isothiocyanate 
     18 g of N-(4-trifluoromethylthiobenzyl)phthalimide was dissolved in 200 ml of ethanol, and 4 g of hydrazine hydrate was added dropwise. The mixture was then heated under reflux for 3 hours, and then allowed to cool. Concentrated hydrochloric acid (10 ml) was added, and the mixture was heated under reflux for 4 hours. The precipitate formed was separated by filtration, and the ethanol solution as the filtrate was evaporated under reduced pressure. The residue was dissolved in 100 ml of water. The solution was washed with 50 ml of hexane and adjusted to pH 11 with an aqueous solution of sodium hydroxide. Ethyl acetate (100 ml) was added, and the mixture was washed with water and dried. Ethyl acetate was evaporated under reduced pressure to give 8.0 g of an oily product. The resulting product (8.0 g) was added dropwise to a mixed solution of 7.9 g of DCC, 40 ml of carbon disulfide and 20 ml of ethyl ether with stirring and ice cooling to 25° C. or below. The temperature of the mixture was returned to room temperature, and it was left to stand for 12 hours. The reaction mixture was filtered, and the residue was washed with ethyl ether and combined with the filtrate. The solvent was evaporated under reduced pressure. The resulting oily product was purified by column chromatography (silica gel; developing benzyl isothiocyanate. 
     IRν neat   max  (cm -1 ) 2120, 1500, 1440, 1340, 1305, 1160, 1120, 1085, 1020. 
       1  H NMR δCDCl 3  /TMS (ppm): 4.76(2H, s), 7.34(2H, d, J=9Hz), 7.66(2H, d, J=9Hz). 
     (3) 1-(4-Trifluoromethylthiobenzyl)-3-(2,2,2-trifluoroethylthiourea 
     6.0 g of 4-trifluoromethylthiobenzyl isothiocyanate obtained in (2) above and 2.5 g of 2,2,2-trifluoroethylamine was dissolved in 20 ml of ethyl acetate, and the solution was left to stand at room temperature for 24 hours. Ethyl acetate was evaporated under reduced pressure. The resulting white crystals were recrystallized from hexane to give 6.66 g of the captioned compound. 
     Melting point: 113.5-114.5° C. 
     IR ν neat   max  (cm -1 ) 3260, 3070, 1565, 1380, 1300, 1255, 1140, 1120, 1090, 1020, 960, 855. 
       1  H NMR δCDCl 3  /TMS (ppm): 4.34(2H, dq, J=9Hz), 4.72(2H, J=8Hz), 6.00-6.20(lH, m), 6.60-6.80(lH, m), 7.38(2H, d, J=8Hz), 7.68(2H, d, J=8Hz). 
     REFERENTIAL EXAMPLE 5 
     Synthesis of 1-4-(2,2,2-trifluoroethoxy)benzyl)-3-(2,2,2-trifluoroethyl)thiourea 
     Lithium aluminum hydride (2.0 g) was added to 100 ml of dry ethyl ether, and with ice cooling and ethoxy)benzonitrile in 50 ml of dry ethyl ether was added dropwise over 30 minutes. The excess of lithium aluminum hydride was decomposed with methanol and water, and the reaction solution was extracted with 100 ml of ethyl ether. The ethyl ether solution was washed with water and dried, and ethyl ether was evaporated under reduced pressure to give 11.34 g of an oily product. A portion (5.63 g) of the resulting oily product was added dropwise to a mixture of 5.60 g of DCC, 13 ml of carbon disulfide and 30 ml of ethyl ether with stirring at -10° C. The temperature of the mixture was returned to room temperature, and it was left to stand for 12 hours. The reaction solution was filtered, and the residue was washed with ethyl ether and combined with the filtrate. The solvent was evaporated under reduced pressure. The resulting oily product was purified by column chromatography silica gel; developing solvent hexane/ethyl acetate (9:1)) to give 7.20 g of a purified product. This purified product and  4.00 g of 2,2,2-trifluoroethylamine were dissolved in 20 ml of ethyl acetate. The solution was left to stand at room temperature for 24 hours. Ethyl acetate was evaporated under reduced pressure. The resulting white crystals were recrystallized from hexane to give 9.54 g of the captioned compound. 
     Melting point: 119.0-120.5° C. 
     IR ν KBr   max  (cm -1 ) 3320, 3300, 1610, 1560, 1515, 1460, 1365, 1290, 1250, 1240, 1180, 1165, 1130, 1080, 975. 
       l  H NMR δAcetone-d 6  /TMS (ppm): 4.40-4.90(6H, m), 7.01 (2H, d, J=9Hz), 7.34(2H, d, J=9Hz), 7.20-7.80 (2H, br). 
     REFERENT E 6 
     Synthesis of 1-(4-pentafluoroethylbenzyl)-3-(2,2,2-trifluoroethyl)thiourea 
     (1) 4-pentafluoroethylbenzonitrile 
     15.0 g of sodium pentafluoropropionate and 15.8 g of copper iodide were dried under reduced pressure, and a solution of 4.9 g of 4-bromobenzonitrile in 80 ml of N-methylpyrrolidone was added. The reaction solution was stirred at 162 oC for 5 hours in a current of dry argon. The reaction mixture was allowed to cool, and then 300 ml of diethyl ether and 200 ml of water were added. The insoluble matter was removed by filtration. The filtrate was successively washed with water and a saturated aqueous solution of sodium chloride, and dried. Diethyl ether was evaporated under reduced pressure, and the resulting oily product was purified by column chromatography slica gel; developing solvent hexane/ethyl acetate (9:1)) to give 3.2 g of the desired 4-pentafluoroethylbenzonitrile as an oily product (yield 53.4 %). 
     IRν neat   max  (cm -1 ) 2215, 1410, 1345, 1330, 1280, 1205, 1155, 1100, 985, 960, 835, 740. 
       1  H NMR δCDCl 3  /TMS (ppm): 7.70(2H, d, J AB  =8Hz), 7.84(2H, d, JAB=8Hz). 
     (2) 4-Pentafluoroethylbenzylamine 
     0.79 g of lithium aluminum hydride was suspended in 50 ml of diethyl ether, and a solution of 4.6 g of 4-pentafluoroethylbenzonitrile in 30 ml of diethyl ether was added dropwise. After the addition, the mixture was stirred at room temperature for 30 minutes, and 5 ml of water was added dropwise over 30 minutes. The insoluble matter was removed by filtration. The ether layer was dried, and then diethyl ether was evaporated under reduced pressure to give 4.7 g of the desired 4-pentafluoroethylbenzylamine as an oil. 
     IRν neat   max  (cm -1 ) 3350, 1610, 1575, 1470, 1415, 1340, 1285, 1200, 1140, 1090, 970, 805, 740. 
       l  H NMR δCDCl 3  /TMS (ppm): 1.40(2H, b), 3.90(2H, b), 7.32 (2H, d, JAB=8Hz). 
     (3) 4-Pentafluoroethylbenzyl isothiocyanate 
     4.7 g of 4-pentafluoroethylbenzylamine was added dropwise to a mixture of 4.8 g of DCC, 20 ml of carbon disulfide and 50 ml of diethyl ether with stirring at -10° C. The temperature of the mixture was returned to room temperature, and it was left to stand for 12 hours. 
     The reaction solution was filtered, and the residue was washed with diethyl ether and combined with the filtrate. The solvent was evaporated under reduced pressure, and the resulting oily product was purified by column chromatography (silica gel; developing solvent hexane) to give 2.1 g of the desired 4-pentafluoroethylbenzyl isothiocyanate as an oil. 
     IR ν neat   max  (cm -1 ) 2920, 2190, 2080, 1615, 1415, 1340, 1285, 1200, 1145, 1095, 970, 805, 745. 
       l  H NMR δCDCl 3  /TMS (ppm) 4.70(2H, s), 7.30(2H, J AB  =8Hz), 7.50(2H, d, 
     (4) 1-(4-Pentafluoroethylbenzyl)-3-(2,2,2-trifluoroethylthiourea 
     2.1 g of 4-pentafluoroethylbenzyl isothiocyanate and 0.78 g of 2,2,2-trifluoroethylamine were dissolved in 20 ml of ethyl acetate, and the solution was left to stand at room temperature for 24 hours. Ethyl acetate was evaporated under reduced pressure. The resulting white crystals were recrystallized from hexane to give 2.6 g of the captioned compound. 
     Melting point: 97.3-98.8 
     IR ν KBr   max  (cm -1 ) 3240, 3070, 1570, 1395, 1290, 1250, 1215, 1200, 1165, 1130, 1090, 975, 935, 815, 745. 
       1  H NMR δCDCl 3  /TMS (ppm): 4.1-4.5(2H, m), 4.74(2H, d, J=6Hz), 5.70(lH, b), 6.25(lH, b), 7.34(2H, d, J AB  =8Hz), 7.52(2H, d, JAB=8Hz). 
     REFERENTIAL EXAMPLE 7 
     Synthesis of 1-4-(2-chloro-2-propeneoxy)-benzyl)-3-(2,2,2-trifluoroethyl)thiourea 
     (1) 4-(2-Chloro-2-propeneoxy)benzonitrile 
     10.0 g of 4-cyanophenol and 11.6 g of potassium carbonate were suspended in 100 ml of dimethylformamide, and 9.4 g of 2,3-dichloropropene was added dropwise. The reaction solution was stirred at 80 oC for 3 hours, allowed to cool, and poured into 200 ml of water, followed by extraction with ethyl acetate. The organic layer was washed with a saturated aqueous solution of sodium chloride and dried. Ethyl acetate was evaporated under reduced pressure. The resulting oily product was purified by column chromatography (silica gel; developing solvent hexane/ethyl acetate (9:1)) to give 15.2 g of the desired 4-(2-chloro-2-propeneoxy)benzonitrile as an oil. 
     Refractive index n 20   D  : 1.5607. 
     IR ν neathd  max (cm -1 ): 2210, 1630, 1600, 1570, 1505, 1450, 1300, 1255, 1225, 1165, 1040, 1020, 890, 830. 
       1  H NMR δCDCl 3  /TMS (ppm): 4.65(2H, s), 5.46(lH, d, J=2Hz), 5.53(lH d, J=2Hz), 6.96(2H, d, JAB=10Hz), 7.56 (2H, d, JAB=10Hz). 
     (2) 4-(2-Chloro-2-propeneoxy)benzylamine 
     1 36 g of lithium aluminum hydride was suspended in 50 ml of diethyl ether, and a solution of 7.0 g of 4-(2-chloro-2-propeneoxy)benzonitrile in 40 ml of diethyl ether was added dropwise. After the addition, the mixture was stirred at room temperature for 30 minutes and then 10 ml of water was added dropwise for 30 minutes. The insoluble matter was removed by filtration. The ether layer was dried and diethyl ether was evaporated under reduced pressure to give 6.7 g of the desired 4-(2-chloro-2-propeneoxy)benzylamine as an oil. 
     IR ν neat   max  (cm -1 ) 3360, 3260, 2920, 2860, 1635, 1605, 1580, 1505, 1450, 1385, 1300, 1240, 1215, 1170, 1045, 890, 820, 715, 690. 
       1  H NMR δCDCl 3  /TMS (ppm): 3.72(2H, b), 4.48(2H, s), 5.28 (lH d, J=2Hz), 5.40(lH, d, J=2Hz), 6.72(2H, d, J AB  =9Hz), 7.06(2H, d, J AB  =9Hz). 
     (3) 4-(2-Chloro-2-propeneoxy)benzyl isothiocyanate 
     6.7 g of 4-(2-chloro-2-propeneoxy)benzylamine was added dropwise to a mixture of 7.7 g of DCC, 20 ml of carbon disulfide and 100 ml of diethyl ether with stirring at -10° C. The temperature of the mixture was returned to room temperature, and it was left to stand for 12 hours. The reaction solution was filtered, and the residue was washed with diethyl ether and combined with the filtrate. The solvent was evaporated under reduced pressure. The resulting oily product was purified by column chromatography (silica gel; developing solvent hexane) to give 6.6 g of the desired 4-(2-chloro-2-propeneoxy)benzyl isothiocyanate as an oil. 
     IRν neat   max  (cm -1 ) 2160, 2070, 1690, 1640, 1610, 1510, 1450, 1445, 1350, 1300, 1245, 1220, 1170, 890, 850, 820. 
       1  H NMR δCDCl 3  /TMS (ppm): 4.55(2H, s), 4.60(2H, s), 5.38(lH, d, J=2Hz), 5.49(lH, d, J=2Hz), 6.86 (2H, d, JAB=9Hz), 7.17(2H, d,J AB  =9Hz). 
     (4) 1-4-(2-chloro-2-propenoxy)benzy)-3-(2,2,2-trifluoroethyl)thiourea 
     6.6 g of 4-(2-chloro-2-propeneoxy)benzyl isothiocyanate and 2.7 g of 2,2,2-trifluoroethylamine were dissolved in 100 ml of ethyl acetate, and the solution was left to stand at room temperature for 24 hours. Ethyl acetate was evaporated under reduced pressure, and the resulting white crystals were recrystallized from hexane to give 5.9 g of the captined compound. 
     Melting point: 83.4-84.9° C. 
     IR ν KBr   max  (cm -1 ) 3240, 3070, 1605, 1565, 1505, 1380, 1350, 1295, 1250, 1225, 1165, 1115, 1040, 960, 900, 820. 
       l  H NMR δCDCl 3  /TMS (ppm): 4.30(2H, dq, J=6Hz, 9Hz), 4.52(2H, d, J=6Hz), 4.54(2H, s), 5.40(lH, d, J=2Hz), 5.51(lH d, J=2Hz), 5.94(lH, b), 6.56 (lH, b), 6.94(2H, d, J AB  =9Hz), d, =J AB  =9Hz). 
     REFERENTIAL EXAMPLE 8 
     Synthesis of 1-[3-fluoro-4-(2,2,2-trifluoroethyl)thiourea 
     (1) 3-Fluoro-4-(2,2,2-trifluoroethoxy)benzonitrile 
     2.2 g of oily sodium hydride (60 %) was suspended in 20 ml of dimethylformamide, and 5.50 g of trifluoroethanol was added dropwise at 20° C. The mixture was stirred for 1 hour, and then, a solution of 6.96 g of 4-difluorobenzonitrile in 10 ml of dimethylformamide was added dropwise. The reaction temperature rose up to 30° C. The reaction solution was stirred for 5 hours, and then 2 ml of acetic acid was added. The mixture was poured into 100 ml of ice water and extracted with toluene. The organic layer was dried and toluene was evaporated under reduced pressure. The resulting crude crystals were washed with hexane to give 10.30 g of the desired 3-fluoro-4-(2,2,2-trifluoroethoxy)benzonitrile. 
     Melting point: 62.0-67.0° C. 
     IRν neat   max  (cm -1 ) 3040, 2220, 1605, 1580, 1515, 1505, 1455, 1420, 1315, 1275, 1250, 1220, 1180, 1150, 1120, 1050, 960. 
       1  H NMR δCDCl 3  /TMS (ppm): 4.46(2H, q, J=8Hz), 7.00-7.60 (3H, m). 
     (2) 3-Fluoro-4-(2,2,2-trifluoroethoxy)benzyl isothiocyanate 
     1.40 g of lithium aluminum hydride was suspended in 50 ml of diethyl ether, and a solution of 8.00 g of 3-fluoro-4-(2,2,2-trifluoroethoxy)benzonitrile in ml of diethyl ether was added dropwise. After the addition, the mixture was stirred at room temperature for 30 minutes and subsequently, 10 ml of water was added dropwise over 30 minutes. The insoluble matter was removed by filtration. The ether layer was dried. Diethyl ether was evaporated under reduced pressure to give 7.54 g of crude 3-fluoro-4-(2,2,2-trifluoroethoxy)benzylamine as an oil. 
     The crude 3-fluoro-4-(2,2,2-trifluoroethoxy)benzylamine (7.54 g) was added dropwise to a mixture of 7.45 g of DCC, 15 ml of carbon disulfide and 30 ml of diethyl ether with stirring at -10° C. The temperature of the mixture was returned to room temperature, and it was left to stand for 3 hours. The reaction mixture was filtered, and the residue was washed with ethyl ether and combined with the filtrate. The solvent was evaporated under reduced pressure. The resulting oily product was purified by column chromatography (silica gel; developing 
     3.93 g of the desired 3-fluoro-4-(2,2,2-trifluoroethoxy)benzyl isothiocyanate. 
     Melting point: 38.0-40.0° C. 
     IR ν KBr   max  (cm -1 ) 2160, 2070, 1505, 1435, 1425, 1335, 1310, 1280, 1270, 1250, 1210, 1170, 1145, 1120, 1055, 960, 850. 
       l  H NMR δCDCl 3  /TMS (ppm): 4.42(2H, q, J=8Hz), 4.65 (2H, s), 6.80-7.40(3H, m). 
     (3) 1-3-Fluoro-4-(2,2,2-trifluoroethoxy)benzyl]-3-(2,2,2-trifluoroethyl)thiourea 
     3.15 g of 3-fluoro-4-(2,2,2-trifluoroethoxy)benzyl isothiocyanate and 1.5 ml of 2,2,2-trifluoroethylamine were dissolved in 20 ml of ethyl acetate, and the solution was left to stand for 24 hours. Ethyl acetate was evaporated under reduced pressure. The resulting white crystals were recrystallized from hexane to give 3.92 g of the desired 1-[3-fluoro-4-(2,2,2-trifluoroethoxy)benzyl)-3-(2,2,2-trifluoroethyl)thiourea. 
     Melting point: 88.0-90.0° C. 
     IR ν KBr   max  (cm -1 ) 3260, 3080, 1600, 1570, 1525, 1440, 1390, 1350, 1310, 1290, 1270, 1255, 1195, 1180, 1165, 1135, 1125, 975. 
       l  H NMR δCDCl 3  /TMS (ppm): 4.50(4H, q, J=9Hz), 4.81(2H, d, J=6Hz), 6.90-7.70(5H. m). 
     Table 3 shows the  l  H NMR data, IR data and properties of compounds produced by methods substantially in accordance with Referential Examples 1 to 8. 
     
                                           TABLE 3                                 
__________________________________________________________________________
                                          Melting point                   
                                          or refractive                   
(R.sup.2).sub.n                                                           
   R.sup.3      .sup.1 H NMRδ.sub.TMS.sup.CDCl.sbsp.3               
                               IRν.sub.max (cm.sup.-1)                 
                                          index                           
__________________________________________________________________________
H  4-CH.sub.3                  3220, 3050, 1565, 1410,                    
                                          Melting point                   
                               1370, 1330, 1240, 1145, 132.5-133.4°
                                C.                                        
                               1100, 1035, 960, 910,                      
                               815, 790                                   
                               &lt;KBr&gt;                                      
H  4-Cl         4.43(2H, dq, J=6Hz, J=9Hz),                               
                               3260, 3220, 3050, 1565,                    
                                          Melting point                   
                4.78(2H, d, J=9Hz), 7.39                                  
                               1485, 1410, 1370, 1335,                    
                                          135.0-138.0° C.          
                (4H, s)        1300, 1245, 1180, 1160,                    
                               1105, 1085, 970, 805                       
                &lt;acetone-d.sub.6 &gt;                                        
                               &lt;KBr&gt;                                      
3-Cl                                                                      
   4-Cl         4.09-4.43(2H, m), 4.57(2H, d,                             
                               3290, 3140, 1590, 1490,                    
                                          Melting point                   
                J=6Hz), 6.36-6.49(1H, br),                                
                               1415, 1390, 1350, 1325,                    
                                          78.0-79.7° C.            
                6.79-6.92(1H, br), 6.99-7.37                              
                               1270, 1200, 1185, 1130,                    
                (4H, m)        1050, 990, 985, 885,                       
                               845, 830, 740                              
                &lt;CDCl.sub.3 &gt;  &lt;KBr&gt;                                      
    ##STR30##   4.26(2H, dq, J=6.9Hz), 4.51 (2H, d, J=6Hz), 6.00(1H,      
                brs), 6.58(1H, brs), 6.80-7.40 (9H, m)                    
                               3240, 1585, 1550, 1530, 1500, 1480, 1370,  
                               1350, 1245, 1160, 1145, 1115, 1100         
                                          *Melting point 126.0-127.5.degre
                                          e. C.                           
                &lt;CDCl.sub.3 &gt;  &lt;KBr&gt;                                      
H                                                                         
    ##STR31##   1.00-1.90(2H, br), 4.98(2H, dq, J=6Hz, J=9Hz), 4.77(2H,   
                d, J=5Hz), 5.13(2H, s), 6.92-7.60(9H, m)                  
                               3250, 1610, 1570, 1510, 1380, 1350, 1315,  
                               1295, 1255, 1220, 1160, 1150, 1110, 1020,  
                               690        Melting point 118.5-122.0.degree
                                          . C.                            
                &lt;CDCl.sub.3 &gt;  &lt;KBr&gt;                                      
H  4-OCHF.sub.2 4.16-4.47(2H, m), 4.61(2H, d,                             
                               3240, 3070, 1570, 1550,                    
                                          Melting point                   
                J=6Hz), 5.76(1H, b), 6.32                                 
                               1505, 1440, 1390, 1350,                    
                                          105.5-107.9° C.          
                (1H, b), 6.52(1H, t, J=72Hz),                             
                               1285, 1245, 1215, 1165,                    
                7.13(2H, d, J=9Hz), 7.37(2H,                              
                               1130, 1025, 975, 920,                      
                d, J=9Hz)      860, 825, 805                              
                               &lt;Kbr&gt;                                      
H  4-OCF.sub.2 CHF.sub.2                                                  
                4.30(2H, dq, J=6.9Hz), 4.62                               
                               3220, 3070, 1570, 1560,                    
                                          Melting point                   
                (2H, d, J=5Hz), 5.92(1H, tt,                              
                               1535, 1515, 1375, 1310,                    
                                          54.0-57.0° C.            
                J=3.5Hz), 6.80(1H, b), 6.59                               
                               1280, 1260, 1220, 1200,                    
                (1H, b), 7.18(2H, d, J=8Hz),                              
                               1165, 1120, 1095, 850                      
                7.51(2H, d, J=8Hz)                                        
                               &lt;KBr&gt;                                      
H  4-CH.sub.2 OCH.sub.2 CF.sub.3                                          
                3.83(2H, q, J=9Hz), 4.41(2H,                              
                               3280, 3230, 3070, 1570, Melting point      
                dq, J=6.9Hz), 4.63(2H, s),                                
                               1395, 1380, 1340, 1305,                    
                                          114.5-117.5° C.          
                4.78(2H, d, J=6Hz), 6.9-7.5                               
                               1270, 1250, 1185, 1170,                    
                (2H, m), 7.34(4H, s)                                      
                               1135, 1110, 975                            
                               &lt;KBr&gt;                                      
H  4-OCClCCl.sub.2                                                        
                4.37(2H, dq, J=9.6Hz), 2.65                               
                               3220, 3060, 1590, 1565,                    
                                          Melting point                   
                (2H, d, J=5Hz), 5.95(1H, m),                              
                               1495, 1375, 1340, 1305,                    
                                          100.0-103.9° C.          
                6.51(1H, m), 7.07(2H, d,                                  
                               1290, 1280, 1245, 1200,                    
                J=7Hz), 7.37(2H, d, J=7Hz)                                
                               1185, 1155, 1140, 1120,                    
                               955, 825                                   
                               &lt;KBr&gt;                                      
H  4-SCH.sub.2 F                                                          
                4.16-4.55(2H, m), 4.77(2H, d,                             
                               3240, 3060, 1575, 1490,                    
                                          Melting point                   
                J=7Hz), 6.89(1H, t, J=54Hz),                              
                               1435, 1375, 1300, 1240                     
                                          117.5-119.0° C.          
                7.35(2H, d, J=8Hz), 7.53(2H, d,                           
                d, J=8Hz), 7.64-8.05(2H, m)                               
                               &lt;KBr&gt;                                      
H  4-SCF.sub.2 Br                                                         
                4.18-4.76(2H, m), 4.77(2H, d,                             
                               3230, 3060, 1570, 1370,                    
                                          Melting point                   
                J=6Hz), 6.04-6.44(1H, m),                                 
                               1345, 1310, 1290, 1250,                    
                                          88.0-98.5° C.            
                6.65-6.96(1H, m), 7.42(2H, d,                             
                               1150, 1120, 1050, 970,                     
                J.sub.AB =8Hz), 7.70(2H, d,                               
                               930, 830, 680, 645                         
                J.sub.AB =8Hz)                                            
                               &lt;KBr&gt;                                      
H  4-CF.sub.2 CF.sub.2 CF.sub.3                                           
                4.21(2H, m), 4.73(2H, d,                                  
                               3290, 1150, 1430, 1410,                    
                                          Melting point                   
                J=5Hz), 6.02(1H, m), 6.53                                 
                               1370, 1350, 1335, 1300,                    
                                          65.0-67.0° C.            
                (1H, m), 7.20-7.60(4H, m)                                 
                               1270, 1250, 1225, 1170,                    
                               1145, 1105, 1075, 900,                     
                               820                                        
                               &lt;KBr&gt;                                      
H  4-CH.sub.2 C(CF.sub.3).sub.2 CF.sub.2 CF.sub.2 CF.sub.3                
                3.53(2H, s), 4.34(2H, dq,                                 
                               3270, 1560, 1375, 1350,                    
                                          Melting point                   
                J=9.6Hz), 4.64(2H, d, J=6Hz),                             
                               1335, 1270, 1230, 1200,                    
                                          53.0-56.0° C.            
                6.01(1H, m), 6.62(1H, m),                                 
                               1160, 1110, 1045, 980,                     
                7.25(4H, s)    885, 830, 730, 700                         
                               &lt;KBr&gt;                                      
H  4-CF.sub.2 (CF.sub.2).sub.4 CF.sub.3                                   
                4.26(2H, m), 4.67(2H, d,                                  
                               3230, 3060, 1570, 1415,                    
                                          Melting point                   
                J=5Hz), 5.90(1H, m), 6.40                                 
                               1380, 1345, 1315, 1280,                    
                                          116.0-119.0° C.          
                (1H, m), 7.10-7.50(4H, m)                                 
                               1240, 1220, 1195, 1150,                    
                               1120, 1105, 1090, 1040,                    
                               1010, 970, 840                             
                               &lt;KBr&gt;                                      
H  4-CHCCl.sub.2                                                          
                4.35(2H, m), 4.64(2H, d,                                  
                               3280, 3230, 3070, 1570,                    
                                          Melting point                   
                J=3.9Hz), 5.90(1H, b), 6.50                               
                               1420, 1380, 1345, 1310,                    
                                          117.0-122.0° C.          
                (1H, b), 6.83(1H, s), 7.29                                
                               1250, 1190, 1170, 1115,                    
                (2H, d, J=8.2Hz), 7.52(2H, d,                             
                               1055, 980, 915, 830                        
                J=8.2Hz)                                                  
                               &lt;KBr&gt;                                      
H  4-COOC(CH.sub.3).sub.3                                                 
                1.59(9H, s), 4.42(2H, dq,                                 
                               3330, 3200, 1695, 1545,                    
                                          Melting point                   
                J=6.9Hz), 4.80(2H, d, J=6Hz),                             
                               1315, 1305, 1250, 1155,                    
                                          98.0-99.0° C.            
                6.90(1H, b), 7.22(1H, b),                                 
                               1125, 1105                                 
                7.34(2H, d, J=8Hz), 7.87                                  
                (2H, d, J=8Hz)                                            
                               &lt;KBr&gt;                                      
H  4-OQ.sup.4   4.25(2H, dq, J=6.9Hz), 4.60                               
                               3320, 3180, 3030, 1600,                    
                                          Melting point                   
                (2H, d, J=6Hz), 6.22(1H, m),                              
                               1560, 1555, 1540, 1460,                    
                                          137.0-141.0° C.          
                6.57(1H, m), 7.10(2H, d,                                  
                               1400, 1380, 1330, 1310,                    
                J=9Hz), 7.35(2H, d, J=9Hz),                               
                               1255, 1250, 1195, 1170,                    
                7.95(1H, d, J=2Hz), 8.10                                  
                               1150, 1125, 1095, 1100,                    
                (1H, b)        1075                                       
                               &lt;KBr&gt;                                      
H  4-OCH.sub.2 CBrCH.sub.2                                                
                4.21-4.33(2H, m), 4.50                                    
                               3220, 1605, 1560, 1530,                    
                                          Melting point                   
                (2H, s), 4.59(2H, s), 5.66                                
                               1500, 1375, 1345, 1290,                    
                                          80.3-81.1° C.            
                (1H, s), 5.96(1H, s), 6.25                                
                               1245, 1215, 1150, 1105,                    
                (1H, br), 6.78(1H, s), 6.85                               
                               1030, 900, 815, 700                        
                (2H, d, J.sub.AB =8.9Hz), 7.18(2H,                        
                d, J.sub.AB =8.9Hz)                                       
                               &lt;BBr&gt;                                      
H  4-OCH.sub.2 CClCHCl (E)                                                
                4.44-4.57(2H, m), 4.74(2H,                                
                               3260, 1565, 1535, 1515,                    
                                          Melting point                   
                d, J=5.4Hz), 4.91(2H, s),                                 
                               1380, 1255, 1225, 1170,                    
                                          76.8-77.7° C.            
                6.71(1H, s), 6.95(1H, d,                                  
                               1120, 1040, 820, 710,                      
                J.sub.AB =8.4Hz), 7.30(2H, d,                             
                               660                                        
                J.sub.AB =8.4Hz), 7.35(1H, br),                           
                7.56(1H, br)                                              
                               &lt;KBr&gt;                                      
H  4-OCH.sub.2 CClCHCl (Z)                                                
                4.45-4.61(2H, m), 4.74-4.77                               
                               3260, 1610, 1570, 1510,                    
                                          Melting point                   
                (2H, m), 4.81(2H, s),                                     
                               1380, 1350, 1300, 1250,                    
                                          64.2-65.7° C.            
                6.04-7.00(3H, m), 7.31(1H, d,                             
                               1215, 1170, 1110, 1040,                    
                J.sub.AB =8.9Hz), 7.35(1H, br),                           
                               960, 830, 705, 660                         
                7.59(1H, br)                                              
                               &lt;KBr&gt;                                      
__________________________________________________________________________
 
    
     Q 4  in Table 3 shows the following structural formula. ##STR32## 
     The following Formulation Examples illustrate agents comprising the compounds of geneal formula (I) produced by this invention as active ingredients and the method of producing them. The invention, however, is not limited to these examples. 
     FORMULATION EXAMPLE 1 
     Emulsifiable concentrate 
     
         ______________________________________                                    
Compound produced by the invention                                        
                      10 parts                                            
Sorpol ® 355S (tradename for a                                        
                      10 parts                                            
surface active agent made by                                              
Toho Chemical Co., Ltd.)                                                  
Xylene                80 parts                                            
______________________________________                                    
 
    
     The above ingredients were mixed to form an emulsifiable concentrate. 
     FORMULATION EXAMPLE 2 
     Wettable powder 
     
         ______________________________________                                    
Compound produced by the invention                                        
                      20 parts                                            
Sodium lignosulfonate 10 parts                                            
Sodium alkylnaphthalenesulfonate                                          
                       5 parts                                            
White carbon           5 parts                                            
Diatomaceous earth    60 parts                                            
______________________________________                                    
 
    
     The above ingredients were mixed and pulverized uniformly to form a wettable powder. 
     FORMULATION EXAMPLE 3 
     Dust 
     Three parts of a compound in accordance with this invention was dissolved in 10 parts of acetone, and parts of clay was added. Acetone was then evaporated to give a dust. 
     FORMULATION EXAMPLE 4 
     Granules 
     Three parts of a compound produced by the invention, 1 part of sodium lignosulfonate, 20 parts of talc and 76 parts of bentonite were mixed, and kneaded with a moderate amount of water. The mixture was granulated and dried to give granules. 
     FORMULATION EXAMPLE 5 
     Bait 
     One part of a compound in accordance with this invention, 5 parts of sugar, 50 parts of wheat bran, 20 parts of rice bran and 24 parts of wheat flour were mixed and kneaded with a moderate amount of water. The mixture was then granulated and dried to give a bait. 
     The following Test Examples illustrate the superior insecticidal activity of the compounds of this invention. All tests were conducted through three replicates, and the results were shown by averages of the results obtained. 
     TEST EXAMPLE 1 
     Effect against tobacco cutworm 
     An emulsifiable concentrate prepared in accordance with Formulation Example 1 was diluted with water to a concentration of 500 ppm and 50 ppm. Cabbage leaves were immersed in the emulsions, and then air-dried. The treated leaves were transferred to a plastic cup and ten 2nd-instar larvae of tobacco cutworm were caused to feed on the treated leaves. Five days later, the mortality (%) of the insects was examined. The results are shown in Table 4. 
     It is seen from Table 4 that the compounds of this invention have stronger insecticidal activity than known comparative compounds of a similar structure. 
     TEST EXAMPLE 2 
     Effect against cabbage moth 
     An emulsifiable concentrate prepared in accordance with Formulation Example 1 was diluted with water to a concentration of 500 ppm and 50 ppm, and sprayed by a hand sprayer onto cabbage seedlings (5- to 6-leaf stage) in pots to such an extent that the chemical lightly trickled over the leaves. After air drying, the leaves were cut off and put in a plastic cup. Ten 2nd -instar larvae of cabbage moth were caused to feed on the treated leaves, and five days later, the mortality of the insects was examined. The results are shown in Table 5. 
     Table 5 shows that the compounds of this invention have stronger insecticidal activity than known comparative compounds of a similar structure. 
     TEST EXAMPLE 3 
     Effect against small brown planthopper 
     An emulsifiable concentrate prepared in accordance with Formulation Example 1 was diluted with water to a concentration of 500 ppm and 50 ppm, and sprayed by a hand sprayer onto 5 to 6 rice seedlings (3-leaf stage) to such an extent that the chemical lightly trickled over the seedlings. After air drying, the rice seedlings were held in a plastic cylinder. Ten last-instar larvae of small brown planthopper about one day after ecdysis were inoculated in the rice seedlings. The cylinder was maintained at 25 oC for 16 hours under bright conditions and for 8 hours under dark conditions. Five days later, the mortality of the insects was examined. The results are shown in Table 6. 
     Table 6 shows that the compounds of this invention have equivalent or stronger insecticidal activity to or than the known comparative compounds of a similar structure. 
     TEST EXAMPLE 4 
     Effect against two-spotted spider mite 
     An emulsifiable concentrate prepared by Formulation Example 1 was diluted with water to a concentration of 50 ppm, and sprayed perpendicularly onto 30  to 50 larvae of two-spotted spider mites obtained by incubating spider mite eggs on kidney bean leaf discs having a diameter of 3 cm and placed on wet adsorbent cotton in such an amount that the amount of the chemical on the surfaces of the leaf discs corresponded to about 2 microliters/cm 2 . The treated mite larvae were placed in an incubator at 25° C., and four days later, the mortality of the insects was examined. The results are shown in Table 7. 
     It is seen from Table 7 that the compounds of this invention have equivalent or stronger acaricidal activity to or than the known comparative compounds having a similar structure. 
     The above Test Examples demonstrate that the compounds of this invention have stronger insecticidal activity on lepidopterous insect pests than the known comparative compounds of a similar structure, and equivalent or stronger insecticidal activity on hemipterous insect pests to or than the known comparative compounds of a similar structure; and also that the compounds of this invention have stronger acaricidal activity against mites than these comparavive compounds. 
     
                       TABLE 4                                                     
______________________________________                                    
                Mortality (%)                                             
Test compound No. 500 ppm  50 ppm                                         
______________________________________                                    
 6                100      100                                            
 9                100      100                                            
 12               100      100                                            
 18               100      100                                            
 27               100      100                                            
 38               100      100                                            
 40               100      100                                            
 47               100      100                                            
 71               100      100                                            
 75               100      100                                            
 76               100      100                                            
 77               100      100                                            
 82               100      100                                            
 91               100      100                                            
 93               100      100                                            
 98               100      100                                            
 99               100      100                                            
101               100      100                                            
120               100      100                                            
125               100      100                                            
166               100      100                                            
171               100      100                                            
172               100      100                                            
181               100      100                                            
186               100      100                                            
187               100      100                                            
193               100      100                                            
194               100      100                                            
215               100      100                                            
237               100      100                                            
258               100      100                                            
Comparative        0        0                                             
compound (a)                                                              
Comparative       100       20                                            
compound (b)                                                              
Comparative        0        0                                             
compound (e)                                                              
Comparative        0        0                                             
compound (f)                                                              
Non-treated       0                                                       
______________________________________                                    
 
    
     
                       TABLE 5                                                     
______________________________________                                    
                Mortality (%)                                             
Test compound No. 500 ppm  50 ppm                                         
______________________________________                                    
 3                100      100                                            
 6                100      100                                            
 7                100      100                                            
 9                100      100                                            
12                100      100                                            
18                100      100                                            
29                100      100                                            
30                100      100                                            
31                100      100                                            
35                100      100                                            
38                100      100                                            
39                100      100                                            
40                100      100                                            
43                100      100                                            
47                100      100                                            
70                100      100                                            
71                100      100                                            
73                100      100                                            
75                100      100                                            
76                100      100                                            
77                100      100                                            
82                100      100                                            
85                100      100                                            
91                100      100                                            
92                100      100                                            
93                100      100                                            
98                100      100                                            
99                100      100                                            
101               100      100                                            
104               100      100                                            
120               100      100                                            
124               100      100                                            
165               100      100                                            
166               100      100                                            
170               100      100                                            
171               100      100                                            
180               100      100                                            
186               100      100                                            
187               100      100                                            
193               100      100                                            
194               100      100                                            
196               100      100                                            
215               100      100                                            
237               100      100                                            
245               100      100                                            
258               100      100                                            
281               100      100                                            
Comparative        0        0                                             
compound (a)                                                              
Comparative        80       0                                             
compound (b)                                                              
Comparative        0        0                                             
compound (e)                                                              
Comparative        0        0                                             
compound (f)                                                              
Non-treated        0                                                      
______________________________________                                    
 
    
     
                       TABLE 6                                                     
______________________________________                                    
                Mortality (%)                                             
Test compound No. 500 ppm  50 ppm                                         
______________________________________                                    
 7                100      100                                            
29                100      100                                            
30                100      100                                            
35                100      100                                            
38                100      100                                            
40                100      100                                            
44                100      100                                            
71                100      100                                            
73                100      100                                            
92                100      100                                            
186               100      100                                            
193               100      100                                            
215               100      100                                            
237               100      100                                            
Comparative       100      20                                             
compound (a)                                                              
Comparative       100      100                                            
compound (c)                                                              
Comparative       100      100                                            
compound (d)                                                              
Comparative       100      20                                             
compound (f)                                                              
Non-treated        0                                                      
______________________________________                                    
 
    
     
                       TABLE 7                                                     
______________________________________                                    
              Mortality (%)                                               
Test compound No.                                                         
                500 ppm                                                   
______________________________________                                    
 93             100                                                       
 98             100                                                       
 99             100                                                       
101             100                                                       
102             100                                                       
120             100                                                       
187             100                                                       
193             100                                                       
196             100                                                       
220             100                                                       
237             100                                                       
245             100                                                       
258             100                                                       
Comparative      34                                                       
compound (c)                                                              
Non-treated        3.7                                                    
______________________________________                                    
 
    
     Comparative compound (a) is a compound of the folllwoing formula described in Japanese Laid-Open Patent Publication No. 140577/1986. ##STR33## 
     Comparative compound (b) is dichlorvos (DDVP) of the following formula: ##STR34## 
     Comparative compound (c) is diazinone of the following formula: ##STR35## 
     Comparative compound (d) is pyridafenthion of the following formula: ##STR36## 
     Comparative compound (e) is a compound of the following formula described in Japanese Laid-Open Patent Publication No. 3083/1979. ##STR37## 
     Comparative compound (f) is a compound of the following formula described in Japanese Laid-Open Patent Publication No. 140577/1986. ##STR38## 
     As is clearly from the foregoing statement, the tetrahydro-1,3,5-thiadiazin-4-ones of formula (I) and their salts show an excellent controlling effect on pests. Furthermore, agricultural chemical of this invention comprising the tetrahydro-1,3,5-thiadiazin-4-one of general formula (I) or its salt has excellent properties as an insecticidal and acaricidal agent and is useful.